Explain all the measures youve taken thus far. Pull your thermostat away from its base to remove it. . Error E73 indicates that no power is detected on the Rc wire and is one example of this kind of error. If you receive an E73 error message on your Nest, it means theres no power to the Rc wire. All of them will be covered in this article. Youll have to put up with stuffy weather since your Nest Thermostat wont cool down. Even if the power to your HVAC system is off, Nest may still work intermittently because of its internal battery. Check online or your HVAC systems water guide to get help cleaning your clogged drip tube. I understand that these issues can be confusing but I definitely wanted to stop by and see how I could help. Then, do the following as needed: Strip the wire to expose " to " of copper. Its partially correct to assume, then, that the Rc wire gives power to the thermostat. Note that all the causes for such an issue are reversible and can easily be fixed. (Save Your Money), How to Change WiFi on Ring Doorbell? (If this is the case, the problem is with the AC unit.). Same here. Hello, I am trying to install a NEST 3rd generation. My Nest thermostat indicated that there's no power, showing a problem with the red wire indicated in the photo. Jumper wire basics Most of your current thermostat's wires will be connected to. Check the system wires to make sure they are correctly entered and properly connected. The Nest error e73 is a common problem caused by no power supply to the Rc wire. If your system has multiple breakers, ensure to turn them all off. Home/Away Assist adjusts the temperature after you leave. Did you ever hear back on a solution. A full drip pan is the most common reason the AC wont turn on. Yes, it was the float switch!!! To receive assistance with clearing your blocked drip, consult the water guide in your HVAC system or online. What Chime Can I Use With A Blink Doorbell? You may need to reset the device by pressing and holding the reset button on the back of the device for 10 seconds. Other than that I am at a loss! Our line was plugged up with mold and dust, causing water to back up into the HVAC unit's drain pan and setting off a high water switch or condensation overflow switchwhich caused the entire system to shut down. The main drain line that drains the AC from the unit to outside the house was clogged backing up water in the drain causing the float switch to activate. He spent the past twelve years living in Hawaii, where he worked closely alongside event planners and resort owners to perfect his knowledge of luxury products and aesthetics. Next, select Power and look for the number labeled battery. I have an AC specialist installing my Google nest and he has tried everything. If Nest still isnt working properly after following these steps, its time to contact Google Nest Customer Support. You can follow these procedures to fix this problem: Your air conditioner typically needs to work harder when its humid outside. An electrician told me that the Fc wire is really indicative of the AC blowers. Sometimes, the drip pan or drain tube that is supposed to carry condensed water away from the HVAC system can clog up, causing water to back up. Its usually found beneath the cooling coils which, in turn, are usually on the top or bottom of the furnace or air handler. The support people are adequately trained to solve customers problems instantly. There are simple troubleshooting methods that you can try yourself, like checking the breaker box and ensuring that the AC breaker is on. link to What is IMAX? Insert the wire back into the Nest connector while ensuring that the connector button stays pressed down. Follow these procedures to inspect your wiring: A blocked air filter is another frequent issue that may lead to this problem. The fuse between the HVAC system and the thermostat device is blown. Solving such an issue is more than simple; you need to access your breaker box and lift up the switch. Defrosting frozen cooling coils before using them again is the solution if the issue is that they are frozen. Keep reading to learn the most common causes for Nest error e73 and some easiest hacks to fix it. Check to see whether the wire has been rusted or covered with paint. Web nest thermostats can turn itself down when you leave the house, so you don't waste energy on an empty home and nest thermostats save an average of 10% to 12% on heating. Inspect the pipe for any buildup of mold or dirt that could be causing the drain line to back up. Loose wires other than the Rh wire can also cause that power doesn't go to the Rh wire. For the past two months the heat has been working fine, however, now that I need A/C it is still pumping out hot air. This ultimately causes the AC outdoor unit to break down and become non-functional. Now it works and no error message. I did not. However, getting in touch with the Nest support team is the only option you are left with when you have already tried and failed at attempting every other troubleshooting method. If your thermostat shows a low battery alert. Remove the Rc wire and examine it. Then select Settings, Slide on the touch bar to hover over Equipment. If not, you may have more serious blockage, or a broken drain pipe, which will necessitate calling a repairman. Even if an issue does occur, its simple to repair. Jason is an expert writer and is passionate about Smart Homes and Home Improvements writing as well as lifestyle and Lawn Care. As a result, your Nest thermostat wont get electricity from your HVAC unit system, which may result in the E73 error being shown. When the system isnt running, Nest relies on its battery. e73 e74 error. If you are experiencing a lack of power to your RC wire, the issue could be related to one of several factors such as circuit breaker is tripped, RC is not connected properly, damaged or frayed wire. If you discover any water, that means theres a blockage somewhere. The Nest Thermostat may not have Power to the RC wire if any of the following are correct: wiring, air filter, drain tubes/drip pans, and the HVAC fuse. Turn off the electricity to the HVAC system by removing the breaker from the panel. In case you do find water, it indicates that there may be a clog. Check that each wire is fully inserted into its connector and that every connector with a wire is down as shown. Your HVAC systems circuit may have several breakers, so make sure theyre all turned off. Next, turn the dial until you reach "equipment", where you'll see the status of the RC thermostat wire. A professional can navigate the complicated system to avoid damage. Kindly go through all the wires at a time. If the breaker was tripped, flip it back on and see if power has returned to your Nest. Firstly, look for the air filter in the grate in your hallway. The drip pan of the HVAC system is filled. Before checking the wiring on your thermostat, it is most important that you turn off the power to your HVAC system at the breaker. Get an answer from an expert on the Google Home Help Forum. Ways to Fix Nest: No Power To Rh Wire No power to Rh wire is usually caused by a loose wire connection. My new heat pump and Nest Thermostat was installed a year ago. So, the R wire indirectly powers the Nest. I knew I had to find out how to repair it right away. Turn the. The C wire provides power to the thermostat. Reset your circuit breaker to restore electricity. This would then freeze up the clogged substance resulting in your Nest shutting off. The most obvious reason your system isnt receiving power is that the power is off! If your Google Nest Thermostat is not receiving power from your heating, ventilation, and air conditioning (HVAC) system, it will tell you theres a problem. All you need to do is rule out the main cause behind such an error. Nest RC wire has lost power and is shown in red. The air conditioner would not chill the home because it would shut down automatically, the screen would go black, and the fan would not turn on. I very much appreciate it. (2). In this case, youll have both an Rh and an Rc wire. A "No power" alert can be caused by the following: The thermostat wiring is incorrect. Examine the fuse. Locate the cooling coils; you can look for information online or in the users manual of your HVAC system. Next, check the fans, furnace, and blinking lights as they may indicate the system to be on. This fixed my problem. Do the pictures hanging on your wall make you do a double-take when you pass by them? Some HVAC systems, known as dual transfer systems, use separate power for heating and cooling. Some mistakes, on the other hand, may appear impossible. Take a look at the fuse. But you need a C wire for the thermostat to run properly. I had that issue and could not get the system to turn on. Now turn on the breaker to bring back the power. https://support.google.com/googlenest/answer/9245516?hl=en. This can take up to 24 hours. The AC breaker just turns off the power to the air condensing unit outside that cools the air. Also, look at the linking lights, which may indicate that your system is still on. I appreciate it. If you have an RC wire connected to your Nest thermostat, but there is no power running through it. The Quick View Menu will appear when you press the thermostat ring. Check the voltage of the Rc wire now using a voltmeter. Your HVAC system might have multiple breakers throughout the circuit, so ensure all of them are turned off. How Do I Stop Pictures From Tilting On My Wall? After inspecting all this, connect the wire back into your Nest device and press the connector button. Or the second option is first to recognize the main cause and then fix it accordingly. To see whether your air filter needs to be replaced, do the following: To avoid problems like these, change your air filters about once every 90 days. Install a Nest Power Connector if there aren't any spare thermostat wires. Issue solved. Keep yourself safe. Netflix Not Working on Samsung TV: Why & How To Fix! When the air is limited enough, the system can freeze and shut down. It would be best if you did not attempt to remove a sealed panel containing the cooling coils unless you are an experienced technician. Check your air filter with the following steps: As your AC runs, condensation forms, and the drip pan catches it. (5 Easy Fixes), How to Get Adt Alarm Certificate? To determine the status of this wire and if it has power or not, press on the dial and then rotate it until you select the small gear icon, and press the dial once more. Therefore, its necessary to ensure air filters are not clogged to avoid inconvenience. Yes, it was the float switch! To narrow down possible causes of a No power alert, use your thermostat to navigate to its equipment information. But, a Nest thermostat could occasionally cease functioning and show the messages lost power or no power to RC wire detected.. Note that if the voltage is 24vac, only it will receive the power. The Nest thermostat is extremely easy to set up and use, and most of the errors that may pop up are easily fixed. When the system shuts down, it stops sending power to your thermostat. If needed, tap the touch bar to wake up your thermostat. While most reasons may intimidate you, they are not that hard to fix. Thermostats "No power to Rc wire detected" E73. 134,367 views Apr 23, 2018 One possible. Here are the steps to check the HVAC fuse: If none of the above hacks helped you, then feel free to contact the customer support team for their assistance. A blown fuse results in no power to the HVAC system which means no power to the thermostat. A countrys social, lifestyle, culture, and economic condition can be judged by the quality of movies of that country. To get the most out of Google Home, choose your Help Center: U.S. Help Center, U.K Help Center, Canada Help Center, Australia Help Center. I removed the base and tested the power with a multimeter to be at 27.8V Confused, I contacted Nest support and after checking my wiring, they decided to replace the base. Rc wire not recognized. Once I cleaned out the drain line all is working fine and the Nest Code "E73 wiring report" cleared on my Nest 3rd Gen Learning thermostat. Lastly, turn on the power at the breaker box. Free shipping for many products! Once I cleaned out the drain line all is working fine and the Nest Code "E73 wiring report" cleared on my Nest 3rd Gen Learning thermostat. In this case, contact Google Nest Customer Support and inform them of your problem. Switch on your breaker now to restore electricity to your thermostat. Next, inspect the Rc wire by removing it first and exposing. Your furnaces air filter may be inside, in which case youll have to cut off the electricity at the circuit breaker first. (For Insurance), Lost Schlage Programming Code? Lastly, put the thermostat back on the base and wait until the power gets on. If you have decided to fix the issue yourself, start by checking your wiring, air filter, drainage tubes, and HVAC fuse to make sure they are all functioning to solve the Nest Thermostats no power to RC wire detected issue. I did that, but the Nest is still saying there's no power detected on the C wire or the Rh terminal. Nest has been delivering technology that makes living easy for years, and thermostats are yet other devices that do it for us. Or, you have the more practical alternative of calling an experienced HVAC technician who will quickly mend your system. I'm Shah. Get free, zero-commitment quotes from pro contractors near you. He thinks its a defective Nest and should be replaced. To avoid this issue, it might be best to have a professional install your Nest in the first place. Next, using a small funnel, pour about a cup of cleaning vinegar into the pipe. Make sure the connector button is pressed firmly down. Check the drain tube/ drip pans for any clogged material. Moreover, we would suggest you check the rest of the wires too. This should break up any hard water deposits that may have formed, allowing condensation to flow freely. Immediately check air handler to find out where loss of voltage is. I also have same issue - it is not the float line - system installed last March - has worked fine until today - wondering if the software update has anything to do with this??? Now remove your thermostat display from the base. Reinstall the Nest thermostat in the base, then allow a little time for it to restart. This is true. Ensure that it has at least 1 mm of copper exposed and that the copper is not bent. I had this same issue. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Please help. Note: If your Nest Thermostat wont turn on, or if your Nest Thermostat E or Nest Learning Thermostat is having power issues, learn how totroubleshoot when your Nest thermostat wont turn on. Important: You must turn the system off before checking the system wires. However, if none of them work for you, it may indicate a problem with your Nest thermostat. Sometimes, due to overloading, the breaker trips to obstruct the path of electricity from the HVAC system to your Nest Thermostat, which prevents the fuse wire from melting. If it gets water in it that will shut off the power to the thermostat. Nothing has changed. All you need to do is rule out the main cause behind such an error. Use your owners manual as a guide if you need help finding it. If your air filter is clogged, the HVAC system cant maintain proper airflow. Locate the air filter on your system. The main reason behind no power to the RC wire Nest can be the clogged drain line of the air conditioner, which causes the float switch to activate. Troubleshoot a "No power" alert on the Nest Thermostat (E298 or M20 help code), Tell us more and well help you get there, troubleshoot when your Nest thermostat wont turn on, Check whether a C wire or spare wire is available. You may be prompted to look at the screen if your Nest starts acting up for unknown reasons. 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