Ecobee thermostat not turning on ac

How to fix Ecobee Not Turning on the Heat?Is your Ecobee thermostat giving you the cold shoulder? Don't fret! In this comprehensive guide, we'll walk you thr...

Heat Pump Not Turning On Problem Hello Ecobee community, over the weekend I purchased and installed an Ecobee 3 Lite with 2 room sensors and all was going well till this morning. My setup is a heat pump outside (old Trane XE900) and some form of air handler inside. ... This is like what the "dumb" thermostat would be doing.With my old thermostat I could leave the fan on all the time to constantly cycle the air throughout the house. When I switched to the ecobee I noticed my house was freezing when I set the fan to always on. ... Please tell me why would the fan come on if the the AC not heat thresholds are being triggered. This is bad programming and it should be ...Make sure you have the latest version of the ecobee app installed. Keep your phone's Wi-Fi connection turned ON. Turning off Wi-Fi decreases location accuracy even when you are not connected to any Wi-Fi network. Allow cellular data usage for the ecobee app; doing so helps ensure Smart Security can send arm and disarm notifications, even when ...3. Scroll down and select the ecobee widget. 4. Scroll left and right to see the different options. 5. When you see the widget you want, select Add widget. 6. Drag the widget where you want it, then tap Done. Tip: If you have multiple ecobee thermostats, repeat the above steps to add a separate widget for each thermostat in your home or properties.Dec 15, 2019 ... In this HVAC Training Video, I show 10 Possible Heating and Air Conditioning Problems that may be the Result of the Thermostat or Thermostat ...Oct 18, 2021 · If Y1 is not highlighted, select the “No” option on the bottom left because this wiring is not correct. You will then be prompted to modify the selected wires. Manually add the Y1 terminal so that it’s highlighted. Click “Next” and follow the rest of the on-screen prompts to finish the reconfiguration process. 4. This is where the installer messed up. He put AC control wire on the wrong terminal at the furnace. I have a single stage AC. I moved the wire to the correct post (Y). Koodo $40/6GB Public Mobile $117/90GB/90 days, $102/60GB/90 days, $25/5GB, lot less with rewards Tangerine Bank, EQ Bank, Simplii. +1. Reply.

Sometimes your thermostat can be on 'cooling,' but if your temperature is set above your current temperature reading, your ac won't start. To start your ac compressor, set the point below the current room temperature reading. To completely rule out thermostat issues, check how your thermostat was programmed. Ensure it was correctly ...If all the wiring is good but the thermostat doesn't work, you may not have enough voltage. For an Ecobee thermostat, you need more than 24VAC to power the unit. This 24-volt transformer is compatible with Ecobee. Check it out on Amazon. Next, check if the backplate and cover panels are secure since some thermostats and HVAC models don't turn ...The thermostat will relay power, so make sure there is no transformer in the humidifier circuit. You cannot wire it like that. You need to place the Common on the humidifier on the common terminal on the furnace control board, the Hot side goes to the accessory terminal.So I turned my Ecobee off and went to bed. Few hours later I woke up SWEATING. I went and checked the thermostat, it was off. When I went to a vent, I could feel hot air coming out. When I turn on air, cold air comes out, but it almost never fully cools my apartment anymore.To prevent Ecobee sensor false occupancy, it's crucial to pay key attention to the battery. Ecobee smart sensor range extender. If you install the sensors far from the thermostat, they may not give accurate information since their optimal range is 45ft. Open-air sensors may have an extended range of up to 100 feet.Preferences are general settings that vary between equipment operation and appearance settings. On the thermostat. Go to Main Menu > General > Preferences. From here you can edit the following thermostat settings: Temperature Display: You can choose to display temperature values in Fahrenheit or Celsius. To configure this: Tap Temperature Display.

Go into Main Menu -> Settings -> Preferences and turn of Cooling and Heating Smart Recovery and it will likely stop your AC from engaging past the set point. It's looking ahead to your next scheduled set point and trying to cool down to that temperature for when the set point starts. Smart recovery still runs when you manually change the ...This should power the thermostat. (you'll need a jumper from Rc to Rh, more on that later) As described above, Ecobee (and most residential) thermostats work by connecting the desired function to power (W to Rh for heat, for example). This would be bad for the RV as it sits right now (you don't want to send 24vAC to the equipment in the RV) so ...The connections at the thermostat appear to be correct based on the previous thermostat’s connections. I would just double check that the wires are all making a proper contact and maybe check to see that no fuses on the control board of the air handler have blown. If it still won’t turn on swap in the old thermostat and see if it powers ...How to set Reminders & Alerts on your ecobee thermostat. Your ecobee can be configured to send you Reminders when it is time to service your heating and cooling system and when to perform periodic maintenance. Alerts let you know if your heating and cooling equipment isn't performing as it should. Configuring Reminders & Alerts. On the thermostat

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Related Posts. Common ecobee thermostat air quality problems include false readings, incomplete sensor calibration, outdated software, and a blank screen. Quick fixes include calibrating the sensor for an hour, updating the software, and ensuring the device receives power. Read on for a rundown of each issue, as well as the solutions.When your Ecobee thermostat is not heating it could be that it is not momentarily conducting a significant current through its W1 terminal to the furnace controller’s W terminal. You can start by checking if the hot surface ignitor is glowing bright enough. But because the heat is not turning on, it probably won’t glow.Disconnect W on both zones. Jump R to Y on one of your zones. The Compressor LED should light and the ac should come on. If it does, then disconnect one thermostat and troubleshoot one Ecobee at a time. If the LED doesn't come on, then troubleshoot the zone board. If you get a compressor LED but no compressor, then troubleshoot the A/C.Fan running non stop, not turning off with AC. One day of no issues and here we go I guess. First day of install, no problems. AC would shut off at say 74, fan comes back on for a few seconds which I understand is cooling dissipation to clear the vents of cold air and then shut off until a new call for cooling in which this would happen again.Ecobee, like any other thermostat, only starts and stops the equipment. How cold or how warm the air is depends on the equipment itself, unless wrong programming or wiring makes both furnace and AC run at the same time. Switch Ecobee to cool only and lower desired temperature. If air is not cold enough, it's the compressor.In turn, the Ecobee thermostat will turn off automatically when it starts to sense the water going too high on the drain pan. As a result, the power on the AC is cut off too. If you notice the following, this means that the drain pan might be the cause of your Ecobee not turning the AC: the thermostat frequently turns off or reboot

Method 3: Insufficient Transformer. According to Ecobee, another common reason that causes your thermostat to shut off is when you have one or more Ecobee thermostats powered by the same 24 VAC transformer as the boiler and/or boiler zone valves. If this is your case, the easiest way to solve it is by using a separate 24 VAC …Honeywell and Nest thermostat use alkaline batteries. Here the solution is pretty simple: Just change the batteries. If the empty thermostat batteries are the reason, for example, that Honeywell thermostat says heat on but the heat is not turning on, changing the batteries is the quick and easy fix. 4.Apr 27, 2020 · Purchased this new ecobee smart thermostat to replace another one and its not working?? Watch the video to find out what was wrong and save your self a whole... The summer heat can be brutal, and a malfunctioning air conditioning system can make it unbearable. If you find yourself in need of AC repair, you may be wondering where to turn. F...Step 1. Turn off the power to your HVAC equipment. Before disconnecting the existing thermostat or installing the Smart Si thermostat, turn off the power to the heating and air conditioning equipment. Step 2. Remove the existing thermostat. Disconnect the wires to the existing thermostat and remove it from the wall. Step 3. Install your Smart SiEcobee AQI is the lowest (best) its been in a week. Twice as good today as yesterday. I have yet to even find a way to actually "reset" the air quality calibration. I did a factory reset and pulled the thermostat off the wall and let it sit for 30 mins before re-installing it.To do so, tape or place an accurate thermometer near the device on the wall, wait 15 minutes and check the temperature reading on both devices. If they match, the thermostat is calibrated accurately. If not, need to take further action. The problem is usually caused by dust accumulation and improper thermostat installation.Dirt, dust, and debris can pose problems for both electrical and mechanical components, causing your thermostat to fail. Turn off the power source and remove the thermostat's cover. Using compressed air or a small brush, clear the housing of any dust and debris. Once finished, replace the cover and flip the power back on.If this feature is active, it will update the thermostat reading on the main screen. If you want to view your home monitoring temperature reports, you can go to the ecobee web portal by logging into your ecobee account at www.ecobee.com, then once you are signed into the web portal follow the steps: Home IQ > System Monitoring > Download Data.Here are some of the potential reasons why your Ecobee thermostat may not be turning on your AC: – Wiring Issues: The first thing to check is whether the wiring to your thermostat is correct. If the wiring is not connected properly, then your thermostat wont be able to send the signal to your AC.

Press the Nest thermostat’s ring and hold for about 10 seconds. When the screen goes blank, release the ring. Switch on your thermostat by pressing the ring on the thermostat again. Release the thermostat’s ring when the screen turns on. The Nest logo will appear, indicating that the thermostat is restarting.

An Ecobee thermostat is powered by a furnace. If the furnace has no power access, your thermostat will not turn on. Reset any tripped breakers and this should power up your furnace and thermostat. A blown-out fuse; A blown-out fuse on the control board panel of your furnace could be the reason your thermostat is not turning on.On the thermostat. Go to Main Menu > General > System > Humidifier, then tap ON to set a specific humidity level for your thermostat or select Frost Control as an alternative. Dehumidifiers. During setup, the ecobee will request the relay state (open or closed) of your dehumidifier, which can be found in your dehumidifier owner's manual. On the ...Also known as the common wire, the C wire is what enables the continuous flow of 24V power that ecobee thermostats need to operate.. To install an ecobee in an ecobee thermostat in a dual-transformer system, the C wire needs to be connected to the cooling system, not the heating system.. Here's how you can verify that the C wire is coming from the cooling side of your HVAC equipment:Y Wire from the picture above had an unused red wire at the control panel which Ecobee support asked to be installed into the Comm 24V slot (second) along with an already existing C wire. Wires at the furnace. W2 - first slot (empty) Y1 - second slot (empty) DHUM - third slot (empty) G - fourth slot; blue connected to G on the stat.Configuring Reminders & Alerts. On the thermostat. Go to Main Menu > General > Reminders and Alerts, then Preferences. On the app. Tap on Home > Tap on the …Your Ecobee can stop turning on the A/C for a couple of reasons: Your Ecobee is not set in a way that would trigger your air conditioner. The air conditioner is …My ecobee thermostat is no longer able to turn the fan on without the AC running. I like to run the fan periodically in the winter to circulate the air. ... This did work in the past when I first installed the ecobee, for a couple of years. The fan does come on when I turn the AC on, so at least I know it's working Reply reply More replies.Connections on the thermostat. Loose wires or incorrectly connected wires on your thermostat can be the reason why the thermostat doesn’t turn on the heat. So, as the fourth step, we recommend that you inspect the connections. To check the wire connections you have to remove the face of the thermostat from its base.If voltage does not drop suddenly and completely, then this 'power off detected' circuit does not trip - does not reset that thermostat. Solution is to use a long standard circuit - a voltage monitor. Apparently they did not use that. Either modify that power circuit so that power is held off for a few seconds after a blip.

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When your Ecobee smart thermostat reports that the fan is running but no equipment is detected, it essentially indicates a mismatch between what the thermostat perceives and the actual operation of your HVAC (Heating, Ventilation, and Air Conditioning) system. In simpler terms, your thermostat thinks the HVAC equipment should be running, but it ...•. MicCreedy. ADMIN MOD. Ecobee3 Not turning on Heat ...SOLVED! Hello, i have an ecobee3 that i installed over the summer and had no issues with it running my AC over …my ecobee by default had a limit of 35 degrees F set for a threshold. So anything over 35 and it won't turn on the aux heat. the ecobee needs to be configured to allow for aux heat simultaneously with regular heat. here in Florida with my System and my house 45F seems like enough to render my heat pump alone incapable of warming the house.On the thermostat: Go to the Main Menu > General > Comfort Settings , then remove the ecobee thermostat from participating in all of your Comfort Settings. On the ecobee app: Tap Home > Tap on the Thermostat > Menu > Comfort Settings , then remove the thermostat from participating in all of your Comfort Settings.2. I purchased a new Ecobee smart thermostat which requires a C wire (the Nest unit did not) to power the thermostat. I located the blue C wire behind the thermostat, but it was not connected on the other end in the air handler. I located the red wire, which is connected to a safe t switch wire with an orange twist wire connector and connected ...If you have a Fresh Air Ventilator system or Fresh Air Ventilation Damper system connected to your ecobee, you can cool your home with the Free Cooling feature. During the spring and fall, the outside air is often cooler than the air inside your home. If your ecobee thermostat detects this and your system is calling for cooling, your thermostat ...STEP 13. Gently press your ecobee thermostat into the backplate until it 'clicks' into place. STEP 14. Turn the power to your HVAC system back on using the master switch or at the circuit breaker box. STEP 15. Say hi to your new ecobee! The screen will power on and guide you through the set-up and registration.To determine if this is a thermostat issue or an HVAC issue, remove the thermostat off the wall and do a dry contact test by tapping on the wires Rc and W1 together and see if your furnace will come on. If it doesn't, there is something wrong with your furnace. Ended up being a bad contact on the actual air conditioner.In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides, wiring diagrams, troubleshooting tips and more. Check compatibility with your HVAC system. Download the ecobee app to install your thermostat. Download the ecobee app. On the thermostat: Go to the Main Menu > General > Settings > Installation Settings > Thresholds > Auto Heat/Cool, then select Enable. Once it is enabled, you can activate Auto mode by navigating back to the Home screen and selecting the System mode icon above the temperature. You can also activate Auto mode by performing the same action from ... If your Sensi thermostat is not turning on the air conditioner, there are a few potential causes. First, check to make sure that the power switch for the AC unit is turned on. If it's off, turn it back on and wait about 15 minutes to see if the AC starts up again. Next, check to ensure that all of the wires connecting the thermostat to your ... ….

Read on for more information on the Home and Away option, as well as other settings for your Ecobee smart thermostat. Potential home damage. HVAC service companies, such as Ambient Edge, advise homeowners not to turn off the thermostat when leaving the house, especially if they will be gone for an extended period of time. You may save energy ... This will run the fan regardless of the System Mode. To adjust this setting: On the ecobee Thermostat. Go to Main Menu > Fan > Auto, then select the desired runtime from the drop-down menu. On the ecobee app. Tap Home > Tap the Thermostat > Tap the Menu > System > Fan > Select the desired runtime, then press the back arrow to save. Good to know: Turning off your Ecobee motion sensor is a straightforward process that takes only a few moments to complete. Here is a step-by-step guide to help you get the job done quickly and easily. 1. Start by opening the Ecobee app on your smartphone or tablet. 2. Once the app is open, go to the Sensors page and select the motion sensor you would like ...Ecobee thermostat not turning off AC. There are a few reasons why the Ecobee may not be turning off your HVAC system’s fan; The fan is set to “On” instead of “Auto.” Check if your fan is set to “on instead of “auto.” Sometimes the fans stay on even after the air and heat are off.To reset your thermostat’s hardware, pull off the face of the thermostat from the wall and locate the small white reset button labelled H.W reset. Press and hold this button for about 5 minutes. Your thermostat should be reset after this. However, if the hardware reset doesn’t work, then go on to do a software reset.Thermostat Concepts. The ecobee thermostat supports the following key concepts. The target temperature is the temperature that the device attempts to achieve. The target temperature is either determined by the currently active climate or it may be overridden by a hold. When the thermostat is not in auto mode, there is a single target temperature.ecobee SmartCamera. - Hold the Mute and Microphone Buttons, then press the Microphone Button on the settings you want to reset to. ecobee Smart Thermostat (ecobee 5) - You can pull the ecobee off the wall. - You can code in a special switch for rebooting. - Turn the circuit breaker to the furnace on and off.If your ecobee thermostat is producing a clicking noise and not powering on, follow these steps. Possible cause: Insufficient voltage. A clicking noise often indicates insufficient voltage between the RC and C connectors. This could be due to a faulty C wire or improper connection at the HVAC equipment side. Solution: If you've repurposed a ...How to fix Ecobee Not Turning on the Heat?Is your Ecobee thermostat giving you the cold shoulder? Don't fret! In this comprehensive guide, we'll walk you thr... Ecobee thermostat not turning on ac, 2. Low Battery. If the Ecobee is not turning on after installation, it could be because of a low battery. The Ecobee thermostat has a backup battery that will last up to 24 hours if there is no power. If your thermostat was recently installed, or if you haven't updated its firmware, then the thermostat might not turn on immediately., The float switch is a safety feature on an air conditioner. When the AC drain pan becomes too full of water build-up, the float switch automatically cuts power to AC to avoid overflow. No power to the AC means no power to the thermostat. The float switch is located either on the side of the drain pan or at the bottom of the furnace., If it's not, you can change the heat set point on the thermostat interface or in the Ecobee app. First, set your Ecobee Thermostat to Auto mode: Open the menu on your thermostat. Select " Settings .". Choose " Installation Settings .". Select " Thresholds .". Enable " Auto Heat .". Now, you can use the slider on the main ..., My HVAC unit is continuing to run even when the thermostat is set to off. The AC set point was at 70 and I woke up to it running and the temp was 58. I turned off smart recovery and it continues. Turned off power to the whole unit, waited a couple minutes, turned it back on and the unit went back to calling for Cooling even though the ..., Image 1: Traditional Thermostat wiring Image 2: The yellow wires in the image run to a float switch in the condensation drain pan. Image 3: Outdoor Unit thermostat wiring. Even though I have a C spade terminal at my 1995 furnace and a blue wire in my thermostat bundle of wires, my Ecobee Lite 3 will not power on when I try this setup (i.e. no PEK): , Feb 6, 2023 · Make sure the breaker has turned on the power to the circuit. This is mostly missed by the users when setting up the Ecobee Thermostat. Next, You must check the voltage between the RC and C, and that should not be less than 24VAC. There can be circuit issues. You have to use a voltmeter for that. , E cobee has made an announcement that they are going to discontinue support for some of their older thermostat models. Starting July 31, 2024, the ecobee Energy Management …, 3. Scroll down and select the ecobee widget. 4. Scroll left and right to see the different options. 5. When you see the widget you want, select Add widget. 6. Drag the widget where you want it, then tap Done. Tip: If you have multiple ecobee thermostats, repeat the above steps to add a separate widget for each thermostat in your home or properties., If your Ecobee thermostat isn’t automatically turning on the AC, you may be able to fix it by following these steps: Launch the Ecobee app. Tap the three horizontal lines in the upper-left corner of the screen. Select “Set Thermostat” from the menu that appears. Select “Change Settings” at the top of this menu., spiderman1538. •. When the ecobee thermostat is calling for AC for a few minutes, the thermostat will power off on its own. Normally when this issue happens, what you can check for is to see if your furnace drain pan might have signs of water in it which is caused by the condensation of your AC unit. If it does, the drain pan requires ..., Generally, a forced air system will keep running the blower for a minute or two after the call for heat/ac/fan stops. That's so you don't lose the last bit of heat / cooling in the coils after the call for heat/cooling stops. The programming that prevents it from turning off and on rapidly is to protect AC compressors., Not like we live in a mansion with a giant butler's passthru and have servants hiding in there.) So I actually set the Ecobee calibration for the downstairs thermostat to about -2deg vs. what it read to take care of the fact that it perceptually is more comfortable than the bedroom due to the more open airflow, in spite of any sun load thru ..., Reason 3: Bad Wiring. If the batteries are replaced and the thermostat is still not turning on the AC, there's a high chance that it has some wiring issues. If that's the case, you will notice some strange behavior from your AC, apart from being unresponsive. The AC won't maintain the temperature set in the thermostat., On the thermostat. Plug the ecobee back on the wall and begin the setup process again. If the wire still does not appear, then on the wiring screen, press No in the bottom left, then Modify. Select the missing wires and then press Continue, then follow the remaining steps to complete setup. Reconfiguring an already installed ecobee. On the ..., Step 1 – Check the ecobee Thermostat Wiring. We’ll start with looking at potential wiring issues with the ecobee thermostat wire bundle. Loose wire connections could easily stop the A/C from turning on. Remove your thermostat from its wall housing. The wiring terminals will now be exposed., Step 2: Check Circuit Breaker. If your thermostat is not working, you may want to check the circuit breaker. The circuit breaker is responsible for supplying power to the thermostat. If it trips, the thermostat will not function properly. To check the circuit breaker, you will need to locate the breaker box in your home and identify the breaker ..., If the Ecobee says no equipment is running, but the fan is on, there are a few troubleshooting steps that you can take to identify the root cause of the problem. Here are some steps to follow: Check the thermostat display. Check the thermostat display to ensure that it is not set to “Fan Only” mode. If it is, change the setting to “Auto ..., Ecobee 4 not turning on fan in Aux mode. I have a question about the setting "fan control in heat mode"under Aux furnace setting on my Ecobee 4. I installed the thermostat a while back on my single stage Goodman heat pump with Aux heat supplied by heat strips in my furnace. Everything seemed fine this summer as the a/c ran like it was ..., After some investigating, the AC unit outside is not being turned on at all. I checked the circuit breakers and all is well there. My next step was troubleshooting the thermostat. Ecobee's website has me attempting to manually select the G & Y1 wires in the settings, but I believe this fix is if you are not using the PEK setup., When your Ecobee thermostat is not heating it could be that it is not momentarily conducting a significant current through its W1 terminal to the furnace controller’s W terminal. You can start by checking if the hot surface ignitor is glowing bright enough. But because the heat is not turning on, it probably won’t glow., To reset your thermostat's hardware, pull off the face of the thermostat from the wall and locate the small white reset button labelled H.W reset. Press and hold this button for about 5 minutes. Your thermostat should be reset after this. However, if the hardware reset doesn't work, then go on to do a software reset., Turning off your Ecobee motion sensor is a straightforward process that takes only a few moments to complete. Here is a step-by-step guide to help you get the job done quickly and easily. 1. Start by opening the Ecobee app on your smartphone or tablet. 2. Once the app is open, go to the Sensors page and select the motion sensor you would like ..., Installing your ecobee Thermostat. In most homes, installing an ecobee thermostat is an easy DIY project that takes about 20-30 minutes to complete. The installation guide includes step-by-step instructions that make it easy to install and wire your thermostat, so use it as your main reference. You can also refer to this page for extra help., Dec 24, 2022 ... No Heat Ecobee simple fix smart thermostat not working wiring correct gas furnace not calling 4 heat. 25K views · 1 year ago ...more ..., 7 Main Reasons Why Your Ecobee is Not Cooling to Set Temperature. 1. The thermostat is not programmed to the temperature you set it to. 2. The thermostat has shut itself off due to overheating. 3. The air filter is either clogged or dirty. 4., (24 v AC from the control board) Rc: Power for cooling Rh: Power for heating C terminal will use the blue or black wire (Common wire, enables the continuous flow of 24 v AC from the Red wire.) G terminal will use the green wire. (Fan) Y terminal will use the yellow wire. (Air conditioner) W terminal will use the white wire. (Heat), This is an easy way to clear out any settings that might be causing the problem. To reset the router, turn it off for at least 30 seconds and then turn it back on. To reset the thermostat, hold down the reset button for 10 seconds. If the issue still persists, contact ecobee customer support for help., Ecobee I know we don't like ecobee's that aren't level here, I swear I'll fix it before it goes in for good!. Old thermostat. Appreciate any help in advance! My home has a zoned heating system, recently we had a working ecobee removed from our 1st/2nd floor heating system because we had a new furnace/heat pump installed and the contractor either didn't think the ecobee would work or didn't ..., 9 Main Reasons Why Your Ecobee is Not Blowing Cold Air. 1) The Temperature Is Not Set to Overcool. 2) The Thermostat Might Be In Heating Mode. 3) The Temperature Is Set Too High. 4) The Thermostat Is Not Connected To HVAC. 5) Blower Motor Failed. 6) The Air/Lint Filter Has Faded. 7) The Thermostat Is Not In Cooling Mode., May 30, 2018 ... ecobee Pro Install & Startup (1 of 5) · Smart Thermostats & Temperature Automations: Everything I've Learned · How To Use Ecobee Thermost..., Ecobee automatically turns on emergency heat when the outdoor temperature is at 35F (1.7C). For Ecobee, emergency heat and auxiliary heat are almost interchangeable. As mentioned, sometimes your heat pumps do not have enough power to heat in sudden cold temperatures. Ecobee can draw from auxiliary heat in addition to your primary heat source., The float switch is a safety feature on an air conditioner. When the AC drain pan becomes too full of water build-up, the float switch automatically cuts power to AC to avoid overflow. No power to the AC means no power to the thermostat. The float switch is located either on the side of the drain pan or at the bottom of the furnace., Incorrect wiring can cause an Ecobee thermostat to malfunction and blow cold air instead of heat. This can occur if the O/B terminal, a terminal for the reversing valve, is not connected or whose wiring is loose . AC condenser unit not working. For heat pump systems, if the AC condenser unit is not working properly, it can cause the Ecobee ...