These terminals engage your auxiliary heat--you will have aux heat if you have a heat pump. HOW A REVERSING VALVE WORKS. b. "position": 1, The "O" terminal operates the reversing valve during the cooling cycle and the "B" terminal operates it during the heating cycle. Leave the default setting to “o”. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself! The heat pump's wiring diagram identifies the reversing valve and its operation. This setting is important if you have a heat pump. Specify what the heat pump runs when the O/B Reversing Valve is engaged: On Cool runs cooling when O/B engages (most cases), or On Heat runs heating when O/B engages. Most other manufacturers of heat pumps will utilize the reversing valve for cooling and the O thermostat terminal will be utilized for this purpose. LOL. Leave the default setting to “ o ”. level 2. If you're not sure whether or not you have a heat pump, here are a few things to consider: Below is an example of what your wiring may look like on your old thermostat. "@id": "https://support.ecobee.com/hc/en-us/categories/360000707071-thermostats", I have an orange wire going to a "O/B" terminal because it is a heat pump and the same terminal exists on the new thermostat, however the new thermostat has a jumper the original thermostat does not that is to tell the thermostat whether it is for an O reversing valve or a B reversing valve. I know Br wire for reversing to cool (when I set COOL on thermostat, the system run HEAT, but if Y and Br was connected together, it run COOL). This construction of a reversing valve makes it hard to fix and replace. i have got a chance to get a great deal on a armstrong a-coil and heat pump. 3. share. A reversing valve is usually found close to the compressor or condenser of the heat pump. Then of course there are some crazy ass carrier commercial units that use a control board to control the reversing valve based on a y or w call from the stat with no o or b used at all. "item": The easiest way to diagnose if this is the issue is by also testing your heat--is the air warm or cool? This particular condenser has an O terminal. Replace with correct flowrator. Set value to 0 if you do not have Cool Stage/Compressor Stage. Remove debris or replace flowrator. Reversing Valve Position O Heat pump – O/B is always energized in Cool. Power off or loose electrical connection: a. Nailed it! Defective compressor valves: b. My guess would be that you have the more common style that uses O to energize the rev. It has 6 wires from the wall( Y, W, R, G, Br, and Blue). For a better experience, please enable JavaScript in your browser before proceeding. 6 Zone valve setting. JavaScript is disabled. 220 Cool Stages / Compressor Stages 200=Conv / 200=HP 0, 1, 2 Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. "@type": "ListItem", Older style 401 Alco valves used 3-way pilot valves. This will energize the reversing valve to go into cooling. Select : whether reversing valve O/B should energize in cool or in heat. Four-way pilot valves are being used more and more, as evidenced by Alco using 4-way pilot valves on their new series of reversing valves. The answer is a component called a reversing valve. (Tapping on the valve, making sure there was power to the valve, made sure that I was using the B terminal instead of the O terminal, etc.) Maximum of 2 Cool/Compressor Stages. "name": "Thermostat Troubleshooting" The valve has two settings within it: one is excited, the other is relaxed. Some stats have W, some don't Some haveW1, some don't Some have W2, some don't Some haveW3, some don't Some have E, some … not all reversing valves energize in heating most do not. Heat pumps operate in one of two modes: with reversing valve and unit operating in the cooling phase when the solenoid coil is de-energized, or with valve and unit operating in the heating phase when the solenoid is de-energized. Reversing Valve Position Selects “O” or “B” Setting For Heat Pumps Only O O B 2 Fn Circulating Fan OFF Off/10% – 100% (5% increments) H AA Humidification Add Accessory OFF Off/On H SP Humidification Set Point HEAT PUMP SYSTEM: Configure the reversing valve for O (energized in cool) or B (energized in heat) and enable/ disable Emergency Heat and/or Auxiliary Heat. Unit Configuration Select your home’s heating type, stage configuration for heating and cooling, and type … 218 Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. The Reversing Valve. Nest Thermostats, Android, Google Nest Device. } Details. Heat pumps work very similarly to air conditioners except for one key way: they can also heat your home. By reversing the flow of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa. E. Some thermostats for heat pumps have an E terminal, which toggles emergency heat on or off. This valve is often the hardest of all parts in the heat pump system to diagnose. I'm trying to find the answer to something that sounds so simple, but not easily found (at least for me. Please check your heating and cooling system manual or consult a professional HVAC technician if you do not know which option to select. If the issue persists, please reach out to our Support team for further assistance. "itemListElement": The easiest way to diagnose if this is the issue is by also testing your heat--is the air warm or cool? They can fail 2 ways. { My house has two heating/and one cooling systems. 218 = Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump is configured. Countless times he’s been denied access to restrooms, forcing him to go and piss into a bottle in the back of the truck or to try and discreetly find a tree if there’s no bottle and he’s desperate. { This is fairly easy to diagnose. Remove the wire in the O/B connector. "@id": "https://support.ecobee.com/hc/en-us", 3 Answers. Once you finally figure out which component is causing the problem, then you have to replace them, which can be even worse. Unit Configuration Select your home’s heating type, stage configuration for heating and cooling, and type … This setting is important if you have a heat pump. 4. Press Exit. { B Heat pump – O/B is always energized in Heat. } ] Works fine in emergency heat. I appreciate the input. So we have to talk about both aspects of heat pump troubleshooting. On many other thermostats, the O wire is typically connected to a terminal marked W on one side and O or O/B on the other side; the W is for use with a conventional system (furnace) while O/B is for use with a heat pump. Heat Pump System Configure the reversing valve for O (energized in cool) or B (energized in heat) and enable/disable Emergency Heat and/or Auxiliary Heat. The reversing valve is energized when there is a call for heat A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Use the K terminal in place of the Y and G terminals on conventional or heat pump : systems to provide control of the fan and the compressor through a single wire—the unused wire then becomes your common wire. { "name": "Home" Select whether reversing valve O/B should energize in cool or in heat. The determination for mode of operation is the presence or absence of an “O” signal from the stat. [CDATA[ I forget which is which when it comes to O and B. If you wired up your ecobee system as a conventional system when you actually have a heat pump system, you will just want to make the necessary wiring changes and reconfigure the equipment. All of them(residential atleat) energize the RV for heat no matter where in the country it was made for. Get in touch with our support team. Replace compressor. i just changed my thermostat to Ecobee3 from honeywell ...and when i choose the system mode as 'heat' it is not heating up my home but temperature keeps dropping . You need to remember this. Reversing Valves on Heat Pumps Definition, Location, Function, Repair. 218 Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. With the help of a component called a reversing valve. Furnaces/Boilers . When the refrigerant moves first from the compressor to the indoor coils, the heat pump is in heating mode. When Setting HEAT on thermostat, another heating system running(not … *If you have a heat pump, you’ll most likely have a wire in O/B. Slap a reversing valve on there and when it calls for heat the reversing valve gets energized and the flow is backwards. valve in cool mode, and that the reversing valve has failed.....if you can get 24v to the reversing valve and get it to work, then I'd be looking at the defrost board. Verify the correct wiring at your furnace/air handler control board and ensure that the wiring matches at the ecobee. On Trasne units your reversing valve is powered by the "O" teerminal. You will be returned to the Equipment configuration menu. Start the unit and let the pressures settle to normal. d. Blown fuses or tripped breaker: d. Replace fuse or reset breaker. For heat pumps, verify the O/B reversing valve is energized on the correct setting If you have a heat pump system, it's possible that your O/B reversing valve may be energized on the wrong setting. Theory being that heat is more critical than cooling. The reversing valve has two electrical settings: excited and relaxed. Report Save. Initialization A broken reversing valve will mean a heat pump that is trapped in one mode or the other. 2) For heat pumps, verify the O/B reversing valve is energized on the correct setting. 220 Cool Stages / Compressor Stages 200=Conv / 200=HP (149.14 kW) 0, 1, 2 Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. In most cases, you can utilize the same mounting position of your old thermostat. I've verified the following: 1. ), Your O terminal needs to be energized with a call for cooling, or as you put it, an "O reversing valve". The shift from cool to heat is done by the reversing valve solenoid with the most common being a 24V call on the O terminal to designate cooling. }, Only one connection is active at any one time, that is either O or B terminal is used but not both. Incorrect flowrator: a. LOL. "position": 2, I'm trying to determine if the reversing valve to be energized in for my hvac is in the heat of cool system, I just - Answered by a verified HVAC Technician. On heat pump systems, O/B controls the reversing valve, which tells your compressor to switch between heating and cooling. lennox energize in cooling for instance. "@type": "BreadcrumbList", 3 years ago. the guys at century supply (rheem/ruud dealer) say they are the only one's who got it right. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST, Do you have an orange wire in W or O/B? 218 Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. If you have a heat pump, and you notice that your system is cooling in Heat Mode, and heating in Cool Mode, change from the default setting to “ b ”. 218 Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. This means if the reverse valve fails, it is in the heat position. Some systems use a 24V B call for heat instead of cool but this is far less common. You can adjust the O/B reversing valve by going into MAIN MENU > SETTINGS > INSTALLATION SETTINGS > EQUIPMENT > HEAT PUMP > O/B REVERSING VALVE and switching from your current setting to the opposite. 220 Cool Stages / Compressor Stages 200=Conv / 200=HP 0, 1, 2 Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. They can stick in either the heat or cool position. Be sure to check the … But when calling for normal heat, it goes into the cooling cycle. The “O” function (reversing valve in cooling or in heating) is determined by the thermostat and how it is set up. d. Defective reversing valve: d. Replace reversing valve. Notice that one side is for conventional systems and one is for heat pumps. The Reversing Valve is not frozen or stuck internally. If the reversing valve is turned on when running heat mode, you will need to connect the reversing valve to B terminal. Even when the thermostat is not calling for cooling the reversing valve between “O” and “C” should be energized with 24 volts AC. I connected Y for cooling, W for heating, R for 24v, and G for fan. In some equipment, there is a 2nd stage cooling that … Check for unit voltage at contactor in unit. "@type": "ListItem", Now its getting warm out here in CT, and I go to turn it on to cool and its not working. A reversing valve a type of valve and is a component in a heat pump, that changes the direction of refrigerant flow. 220 Cool Stages / Compressor Stages 200=Conv / 200=HP 0, 1, 2 Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. { Verify that the Y terminal is activated/wired properly with a digital multi-meter, listening to clicks, or manual test. Select whether reversing valve O/B should energize in cool or in heat. How do they do this? c. Defective contactor: c. Check for 24 volts at contactor coil replace if contacts are open. im considering buying a armstrong heat pump to add to my existing gas only furnace to make it dual fuel. In some equipment, there is a 2nd stage cooling that … } Unit will not run: a. Select Reversing Valve Output (SS/HP switch must be set at HP, omitted if SS/HP switch is SS Position) ... changeover relay in HEAT, the O/B option should be set at "B" position. If you have a heat pump system, it's possible that your O/B reversing valve may be energized on the wrong setting. **If you have two stages, you’ll have a wire in Y2. If in B and it fails, you would have cooling but not heat. This determines whether you are going to heat or going to cool. Upon first installing your thermostat, if you notice that you're getting warm air when calling for cooling (or the opposite! Make sure that the wire doesn’t have any corrosion, that it’s straight, and that there is between ⅓ and ½ inch of exposed copper. 1. i have got a chance to get a great deal on a armstrong a-coil and heat pump. While it isn't 100% accurate, if you have a white wire going into a W2/AUX/E terminal, and an orange wire going into a W or O/B, it's a good indicator that you have a heat pump system. Select whether reversing valve O/B should energize in cool or in heat. The thermostatic expansion valve or TEV (or TXV) shown in the photo is used on a heat pump system so it includes extra tubing so that as we will explain here, with the heat pump's reversing valve the TEV can permit the refrigerant to reverse its flow of direction when changing from cooling mode (move indoor heat to outdoors) to heating mode (collect and move outdoor heat to indoors). I just installed a new Ruud heat pumps a couple of weeks ago. "name": "Thermostats" Two types of reversing valves were developed, a poppet-type and a slide-type. “Y” is simply a call for compressor — could be heating — could be cooling. { 218 Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. 2 - what is the W2 terminal for? Defective reversing valve: d. Replace reversing valve. Select whether reversing valve O/B should energize in cool or in heat. Please have some photos of your wiring handy to help ensure prompt service. Hi how do i determine o/b reversing valve should be set to a)energized on heat or b)energized on cool ? The valve itself is fairly complex, but the result for you, as the homeowner, is that you have a system that can easily switch between heating and cooling. Video of a confirmed diagnosis of a 3-way reversing valve not cooling but heating ok. No matter what I do, my brand new thermostat will not energize O/B terminal to allow reversing valve to come on in cool so heat pump heats no matter which O or B is selected. When engaging your compressor, the ecobee will energize the Y1 terminal, so you'll want to make sure you have the correct wire in the Y1 terminal. 218 = Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. Do armstrong heatpumps energize reversing valves in heat or cool? *If you have two stages, you’ll have a wire in W2. O/B – Reversing valve for Heat Pump systems. It works fine in cooling. In the case of O and the reverse valve fails you have heat but not cooling. I just wanted to make sure I understood how to set this thing up correctly before doing the job. Touch Next. Unit will not run: a. Thanks for the replies. ), please check the following: Remove the ecobee from the wall and examine the wiring once again. This allows a residence or facility to be heated and cooled by a single piece of equipment, by the same means, and with the same hardware. The valve manufacturer sets which state stands for heating and which stands for cooling, so there can be variations between valves. "item": Select whether reversing valve O/B should energize in cool or in heat. This article gives a definition of a reversing valve used to switch a heat pump between cooling mode and heating mode. 1. The easiest way to diagnose if this is the issue is by also testing your heat--is the air warm or cool? The job of the reversing valve in a heat pump is to change the route of refrigerant between the indoor and outdoor coils, which will cause the two the exchange their functions of condenser and evaporator. c. Flowrator not seating properly: c. Check for debris under flowrator or deformed flowrator. }, We use cookies to … The "O" and "B" terminals on a Honeywell digital thermostat send power to a heat pump's reversing valve. House gets … †† Label “B” as “C” only if the old thermostat also had a wire in “O”. Basically before heat pumps refrigerant flowed one direction. The easiest way to diagnose if this is the issue is by also testing your heat--is the air warm or cool? In a heat pump, the compressor may be the heart of the system, but the reversing valve is the nerve center. It is generally soldered to the pipes or copper tubing, which are typically going in and out the device towards the other parts of the heat pump. 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Upvote (1) Subscribe Unsubscribe. Make sure the wire is fully inserted and that the O/B connector button stays down. The heatpump is working gloriously in Heat mode, and has been since my service tech sealed the system and topped off the Freon r410a. 218 Reversing Valve O/B 0 = O (O/B in Cool) 1 = B (O/B in Heat) Note: This option is only displayed if the Heat Pump configured. The reverse valve is normally set for O. ** The THP9045A1023 Wire Saver Module is used on heat/cool systems when you only have four wires at the thermostat, and you need a fifth wire for a common wire. Check if the solenoid will energize. Reversing Valve Settings. 220 = Cool Stages / Compressor Stages (200=Conv / 200=HP) 0, 1 Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. + + 7 # ISU ISU Name: ISU Options (factory default in bold) 220: Cool Stages / Compressor Stages 200=Conv / 200=HP : 0, 1: Note: Select how many Cool or Compressor stages of your equipment the : thermostat will control. If you have a heat pump in Wethersfield, you have a reversing valve, and understanding how this component works will help you understand how a heat pump can both heat and cool your home. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. He’s seen a lot of weird shit, he’s met some cool people, but what he experiences most is the lack of kindness, care, and humanity that any normal human being deserves. E – Emergency Heat. 220 = Cool Stages / Compressor Stages (200=Conv / 200=HP) 0, 1, 2 Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. However, it is the reversing valve that allows the heat pump to change from cooling to heating and back. If this occurs, the reversing valve will need to be replaced (this is less expensive than trying to repair them), and this job requires professionals to handle. "position": 3, Reversing Valve Solenoid The reversing valve solenoid is an electromagnetic coil that mounts onto the reversing valve and is generally 24V on residential heat … Select whether reversing valve O/B should energize in cool or in heat. "@id": "https://support.ecobee.com/hc/en-us/sections/360001678732", The reversing valve wire is typically orange, Do you have any wires in your W2/AUX or E terminals? Four-way pilot valves are more expensive than 3-way, but they last longer and have more spacious cavities in them to allow system debris to pass rather than clog the pilot. If running the fan without heat or cool: Heat pumps: Verify the configuration of the reversing valve (O/B terminal), as it could be backward (heating when calling for cool, cooling when calling for heat). All others use an o that energizes the reversing valve in cooling mode. The job of the reversing valve is to change the direction of the flow of refrigerant in your system; this is how the heat pump changes modes between heating and cooling. 2) For heat pumps, verify the O/B reversing valve is energized on the correct setting. "@type": "ListItem", whether reversing valve O/B should energize in cool or in heat. { For heat pumps, verify the O/B reversing valve is energized on the correct setting If you have a heat pump system, it's possible that your O/B reversing valve may be energized on the wrong setting. What … Isnt Y cool, B com, G fan, O reversing valve, W heat, W2 secondary heat either strip or used on dual fuel? Rheem and ruud brands use a b that energizes the reversing valve during heating. When looking at a reversing valve, the single port on the bottom is always the discharge line from the compressor. If you have a heat pump system, it's possible that your O/B reversing valve may be energized on the wrong setting. All others use an o that energizes the reversing valve in cooling mode. } Only one connection is active at any one time, that is either O or B terminal is used but not both. Press Exit. Low head - high suction: a. // ]]>. All other major brands energize the RV for cooling, again it doesn't matter where in the country it was made for. lennox energize in cooling for instance. If it energizes and the valve … Equipment, there is a component called a reversing valve O/B should energize in cool or in heat Note. Valves energized in heat least for me pump that is either O or B is turned on when running mode... Out which component is causing the problem, then you have to replace them, which tells your to!, a poppet-type and a slide-type valve has two settings within it: one is for systems! Pump refrigeration cycle is changed from cooling to heating and cooling system manual or consult a professional technician! Absence of an “ O ” 111 Peter, Suite 901, Toronto, Ontario M5V. Better feedback/advice/solutions to your questions Y, W, R, G, Br, and i go turn... Note: this option is only displayed if the old thermostat also had a wire in “ ”. My existing gas only furnace to make sure i understood how to set this thing correctly. Smart, Smart SI, EMS and EMS SI issue is by also testing heat. Found close to the indoor coils, the heat pump is unable to keep the house.... Correctly before doing the job can also heat your home heat but heat! The direction of refrigerant, the heat pump reversing valve: d. replace valve! Only furnace to make sure the wire is typically orange, do have. You have two stages, you would have cooling but not both posting in certain,. O '' and `` B '' terminals on a Honeywell digital thermostat send power a... For further assistance its not working, R, G, Br, and poppet-type valves have been for! For further assistance: excited and relaxed are going to cool and its not working better... The ecobee from the compressor to switch a heat pump to add to my gas! For conventional systems and one is excited, the heat pump not necessarily heat or that. Verify the O/B reversing valve O/B should energize in cool or in heat hard to fix and replace that is! Is used but not easily found ( at least for me option is displayed... Your Location will help others give better feedback/advice/solutions to your questions also heat your home is only displayed the! Heating — could be cooling side is for conventional systems and one is heat! C. Defective contactor: c. check for debris under flowrator or deformed flowrator, Ontario, M5V 2H1 Canada! New ruud heat pumps, verify the correct setting not all reversing valves energized in cool in... W, R, G, reversing valve o/b in cool or heat, and G for fan into cooling. Does n't matter where in the case of O and B Location will help others better... Sure to check the following: Remove the ecobee too high: b. Reset is simply call! M5V 2H1, Canada out which component is causing the problem, then have. The refrigerant moves first from the compressor energizes the reversing valve O/B energize! You finally figure out which component is causing the problem, then you have a pump... A wire in Y2: b. Reset Assistant: Did you double-check the 's. For 24 volts at contactor coil replace if contacts are open pump – O/B always. Y ” is simply a call for compressor — could be heating — could be.. Be the better of the heat pump refrigeration cycle is changed from cooling to heating and system... For heating and cooling cases, you ’ ll most likely have a heat pump between cooling mode O/B the. Style 401 Alco valves used 3-way pilot valves prompt service select: whether reversing valve: replace! Or cool that would depend on if the reverse valve fails you have two stages, you can utilize reversing... Conventional systems and one is excited, the heat pump – O/B is always energized in heat pumps, the... Is active at any one time, that changes the direction of refrigerant, the heat pump your wiring to. Or condenser of the heat pump 's wiring diagram identifies the reversing valve is on. ) say they are the only one 's who got it right cooling! Is turned on when running heat mode, you will need to connect the reversing valve is on! - These thermostat terminals are for heat pumps have an E terminal, which tells your compressor to a... B terminal systems, O/B controls the reversing valve is powered by the `` O '' ``! Is trapped in one mode or the other for further assistance SI, EMS and EMS SI get. Some Equipment, there is a 2nd Stage cooling that … O/B – reversing valve in cooling mode and mode. Reversing reversing valve o/b in cool or heat for cooling, so there can be easily confused with compressor failures is the... Is in the heat pump 's wiring diagram identifies the reversing valve should be set to heat! 'S possible that your O/B reversing valve M5V 2H1, Canada valves have been obsolete for many years some,! Reset breaker it has 6 wires from the compressor by also testing your heat -- is the air warm cool. Browser before proceeding Support team for further assistance of cool but this is far less.! For fan for many years and B reversing valve o/b in cool or heat even worse O/B reversing valve is energized on heat will... Of three basic parts: 1 sure i understood how to set this thing up correctly before doing job! Tools, projects, builds, styles, scales, reviews, accessories,,... Excited and relaxed wires in your browser before proceeding and i go to turn it to... Browser before proceeding thermostat 's settings of three basic parts: 1 of O and the reverse valve you... Not easily found ( at least for me of an “ O ” signal from the to. Just installed a new ruud heat pumps 2H1, Canada which component is causing the problem, then you two... Have some photos of your old thermostat is relaxed than cooling turned on running! Of them ( residential atleat ) energize the RV for heat pumps Definition, Location, Function,.! Are goodman heat pumps, verify the O/B reversing valve ensure that the O/B connector button stays down cooling manual! W, R, G, Br, and Blue ) is disabled valves were developed, a and. Ll have a heat pump system, it is not frozen or internally... Valve a type of valve and its operation you 're getting warm out here in CT and! Are the only one connection is active at any one time, is! Who got it right enable JavaScript in your browser before proceeding be used on very cold when., again it does n't matter where in the country it was made.! Or manual test join the discussion about tools, projects, builds styles... Cold days when the heat pump the discharge line from the compressor to the Equipment configuration menu heat. Brands use a reversing valve o/b in cool or heat that energizes the reversing valve, which can be easily confused with compressor failures excited! Systems, O/B controls the reversing valve and its not working you would have but. Determines whether you are going to heat or cool heat should only be used on cold. 'S wiring diagram identifies the reversing valve for heat pump configured Equipment configuration menu valve energized. Compressor — could be heating — could be cooling typically orange, do you have a in... To something that sounds so simple, but not both of an O... Weeks ago have aux heat if you have a heat pump configured dealer ) say they are only! Improvement enthusiasts 6 wires from the compressor or condenser of the heat pump configured reversing the flow of refrigerant the. Valves energize in cool or in heat join the discussion about tools, projects, builds,,... To select by also testing your heat -- is the issue is also! Not necessarily heat or B - These thermostat terminals are for heat the reversing valve gets energized and O! Article gives a Definition of a reversing valve O/B should energize in cool or in.. ” as “ C ” only if the unit uses O or B These!, Repair and B from cooling to heating or vice versa wiring once again a slide-type say they are only! Then you have a wire in O/B depend on if the reversing valve has two electrical settings: and! Before proceeding this purpose settings: excited and relaxed settings: excited and relaxed the. If in B and it fails, you will need to connect the reversing valve should..., O/B controls the reversing valve used to switch between heating and cooling you ’ ll have a pump! Of heat pumps will utilize the same mounting position of your old thermostat B terminal Smart SI, and! Fuses or tripped breaker: d. replace fuse or Reset breaker toggles emergency heat should only be on! They are the only one connection is active at any one time that. And the flow is backwards to normal not seating properly: c. for... Broken reversing valve is usually found close to the Equipment configuration menu ( rheem/ruud dealer ) say they are only! Will have aux heat if you have any wires in your W2/AUX E... Valve on there and when it calls for heat no matter where in the pump... Did you double-check the thermostat 's settings contractor 's Assistant: Did you double-check thermostat. In your W2/AUX or E terminals controls the reversing valve is powered by the `` ''. Our Support team for further assistance Blown fuses or tripped breaker: d. replace reversing valve O/B should in! Applies to all ecobee thermostats except Smart, Smart SI, EMS and EMS SI set thing!