Nest Thermostat No Power To Rh Wire (E74 Error): How To Fix. If your system has multiple breakers, ensure to turn them all off. First, follow all the steps one by one until the problem gets resolved. 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. If they are loose or disconnected, reconnect them and see if that solves the issue. Error E73 indicates that no power is detected on the Rc wire and is one example of this kind of error. Check that the wires are inserted correctly in the thermostat. Keep yourself safe. Their machine algorithm learns our behavior, changes house temperatures automatically and helps us save utility bills, and lets us control our home heating and cooling system from our smartphones. This will help them understand the issue in a better way. The blown fuse prevents electricity from flowing from the HVAC system to the thermostat. 3. The No power to Rc wire message is commonly due to incorrect or loose wiring. Switch on your breaker now to restore electricity to your thermostat. Other causes include a low thermostat battery, HVAC pipe or control unit issues. The wire should be inserted back into the Nest connection while maintaining pressure on the connector button. Cleaner ductwork equals cleaner air and less dusting. Next, turn the dial until you reach "equipment", where you'll see the status of the RC thermostat wire. Its important to note that, while the R wire powers your HVAC unit, Nest is powered by the unit while its running. Follow these procedures to fix the problem: When its hot outside, your air conditioner needs to work harder. Check the fuse. Your HVAC systems circuit may have several breakers, so make sure theyre all turned off. It will drain eventually, but if you catch the problem early enough, you can fix it before that happens. If they are loose or disconnected, reconnect them and see if that solves the issue. However, most of them are reversible and thus can easily be fixed. If you only have one R wire, you can put it in either terminal. If you discover that it has been burned or discolored, it has been damaged and must be replaced. Electronic devices are like an addiction to me. . Now it works and no error message. Check that all the connections are tight and secure. There is a fuse in your HVAC unit to heat pump. To determine the source of the problem, try these steps: Usually, following the procedures outlined above will resolve the E73 problem. The wire seems to be similar to the others. Only remove the panel yourself if the cooling coils are hidden behind a sealed one; otherwise, the system might function correctly. 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. But, a Nest thermostat could occasionally cease functioning and show the messages lost power or no power to RC wire detected.. You can use a few drops of soap in water if necessary. Some help codes can be dismissed, but they may appear again if the problem persists. Free shipping for many products! Nest thermostat takes the crown when it comes to the most advanced features and most simplistic functioning. Locate the cooling coils; you can look for information online or in the users manual of your HVAC system. At this time, you can test the voltage of the other wires just in case. Fixing Nest error e73 - No power to Rc wire detected Josh Sherman 08 Aug 2021 3 min read Personal It's been heating up in Texas recently, even more so when I had discovered that our Nest unit was giving us grief about the "Rc wire" not being detected. I am having trouble and not related to float switch. Ensure that the connector button is still pushed when re-inserting the Rc wire into the Nest connector. Note: If you have a dual transfer system, Google recommends contacting a professional to install or troubleshoot your Nest. Jason is an expert writer and is passionate about Smart Homes and Home Improvements writing as well as lifestyle and Lawn Care. An E73 error means theres no power going to your Nests Rc wire. I looked up the error code in Google Nest online and it was suggested to check the drain pan, the filter and the fuse. Make sure that all of your wiring, air filters, drain tubes/drip pans, and HVAC fuses function properly to resolve this issue. So what can you do if your Nest thermostat says no power to Rc wire? If your thermostat shows a low battery alert. Disconnect your HVAC system from power by turning off your breaker. All you need to do is rule out the main cause behind such an error. Here are the steps to check the drain tube/drip pans for clogged material: If you find a clog in your drain tube/ drip pan, search on Google or take the help of the HVAC help guide to get rid of it. If you have an r, rc or rh wire, you can. Check your owners manual if youre unsure. 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. Works fine and then error message and system turns off the AC. My new heat pump and Nest Thermostat was installed a year ago. link to What is IMAX? It could also be located inside the furnace, in which case, youll have to turn off the breaker before removing it. If you cant find a breaker connected to your HVAC system, check near the equipment. (5 Easy Fixes), How to Get Adt Alarm Certificate? Sorry for the late response, but I wanted to drop in here to help. How Do I Stop Pictures From Tilting On My Wall? Examine the Rc wire using a voltmeter to ensure the voltage across the wire is constant. Get free, zero-commitment quotes from pro contractors near you. Test the Rc wiring using a voltmeter. Additionally, here are easy-to-follow, step-by-step installation instructions, with pictures and a list of required supplies. Then select Settings, Slide on the touch bar to hover over Equipment. The above solutions are usually enough to fix the E73 error message. The drip pan is usually found under the cooling coils, connected by plastic drain tubes. Your HVAC system contains a drip pan or drain tube used to remove and carry condensed water from the HVAC system; it sometimes can become clogged if not maintained regularly. Remove the display from the base to see all the wires attached to your thermostat. Once the battery drains, the Nest loses power as well. Explain all the measures youve taken thus far. - YouTube 0:00 / 1:20 Nest thermostat. Garrett DS. On the HVAC system control board, locate the HVAC fuse. To resolve this issue, follow these steps: Usually, during hot weather, your AC has to work extra hard. Make sure to do it carefully and avoid using the thermostat continuously for incessantly long hours, allowing the device to rest in between. Locate the air filter on your system. Home/Away Assist: don't heat or cool an empty home. What Chime Can I Use With A Blink Doorbell? Make that all of the breakers in the system are off, if there are any. This occurs mainly due to extremely hot temperatures, burnt fuse, low voltage to the Rc wire, and much more. All you need to do is rule out the main cause behind such an error. The thermostat was giving me an E73 Error: No power to Rc. Helpful Links: About us Contact us Privacy & Cookies Policy SiteMap Take the following steps to empty the pan: An AC unit that has to work extra hard may result in a blown fuse. We are very thankful to you if you use our links! Nest thermostats usually charge within half an hour when charging via USB but can require up to 2 hours to fully charge if the battery has been completely drained. If you think wires are incorrectly connected to your thermostat and want additional help, contact Nest support. Shut off the breakers to prevent electricity flow to the HVAC system. This is done to avoid a water overflow. Other reasons for this message include the following: You can check for most of these things yourself. Detach the thermostat from the wall and make sure all the wires are in their correct terminals. Your email address will not be published. If you cant find your HVAC systems cooling coils, check online or in the user handbook for directions. Next, inspect the Rc wire by removing it first and exposing. Another suggestion from a previous member was to inspect the drain pan, the filters and the fuse. Sometimes we got a small commission if you buy products using our links. Regardless of which one you have, if theres only one, it powers the entire HVAC systemheat as well as air. 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. The issue is now solved just with the help of some easy steps. This guide will show you how to fix any issues that may occur so that your Nest thermostat resumes functioning normally. If the wires are connected properly, you should check the breaker box to make sure that the circuit breaker has not been tripped. An example of data being processed may be a unique identifier stored in a cookie. Here are the steps to check the wiring of your thermostat: Clogged-up air filters may block the airflow coming from the cooling coil. Installed new 3rd gen Nest, with yellow wire to Y1, green wire to G, Red wire to Rc, White wire to W. Nest thermostat comes on fine, fan blows for fan, fan blows for cool, fan blows for heat but no heat, its cool air. Without a C wire, the thermostat isnt receiving continuous power, and you can expect all sorts of glitches to occur. For severe cases, try using some line from a weed trimmerwhich you gently push down the pipe as far as it will goto bust up any clogs that may have formed. While it can be alarming, there are usually plenty of ways to troubleshoot the problems yourself. Theyll help you in the best possible way. At first glance, an E73 error can seem overwhelming as it brings down your Nest thermostat completely, rendering it unusable until the error is fixed. They will diagnose the problem with your gadget at the earliest and guide you with the right solutions. Insert the Nest thermostat back into the base and wait for it to power back up. If frozen cooling coils are the issue, you will have to let them thaw first and once they are defrosted, use them again. 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