Free shipping for many products! If it gets clogged the system will show this error. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Make sure the connector button is pressed firmly down. 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. Remember that there should be at least 1 mm of bare copper in the wire; the wire should be straight and, in no case, painted over or rusted. The most common of which is in the form of Nest error e73. Reinsert the wire into the terminal. Now it works and no error message. Just wanted to double check to see if you were still needing help on this? Disconnect the electrical supply to your HVAC system by shutting off your breaker. Sorry for the late response, but I wanted to drop in here to help. Ring Chime for Ring Doorbell (2023), 12 Problems AirPods Users Might Encounter (2023), No more programming: With Auto-Schedule, the Google Nest Learning Thermostat learns from you and programs itself..Product note: You can also check your systems compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page. In short, if your Nest Thermostat says there is no power to the RC wire, this could be due to: incorrect wiring, a faulty air filter, obstructed drain tubes/drip pans, and an inoperative HVAC fuse. Take the following steps to empty the pan: An AC unit that has to work extra hard may result in a blown fuse. Cleaner ductwork equals cleaner air and less dusting. Nest has both of these terminals because of how some HVAC systems are designed. Before checking the wiring on your thermostat, it is most important that you turn off the power to your HVAC system at the breaker. As with any product, AirPods come with their own set of problems that can be frustrating for users. We discovered that our Lennox HVAC's air handler unit, which is located in our attic, has a condensation drain line that leads to the outside of the home. If you have an RC wire connected to your Nest thermostat, but there is no power running through it. There are simple troubleshooting methods that you can try yourself, like checking the breaker box and ensuring that the AC breaker is on. I had to clean out the drain line for the air conditioner. Sometimes, if your AC runs a lot, the drip pan becomes full. May I ask, when you say check the fuse, is that the same thing as the circuit breaker or are you referring to a separate fuse closer to the actual HVAC system - be it the furnace or the AC blowers? Also, look at the linking lights, which may indicate that your system is still on. Samsung TV Blinking Red Light: What It Means & How to Fix It! We hope that our recommended products will be beneficial to you. A blocked air filter is a significant and frequent problem that causes E73 errors for several users. So where do you put the wire? The burnt fuse may also interfere with your systems power supply, resulting in the sudden abrupt shutdown of your Nest. One such error is the E73 error which indicates that there is no power detected to the Rc wire. I'm Shah. This will help prevent damage to them and your thermostat. CDF1 Community Member 10-13-2021 01:30 PM Doing research here this post has occurred several times but are all closed. If yes, then there is surely a clog. 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. 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. All you need to do is rule out the main cause behind such an error. A minimum of one millimeter of exposed copper must be present, with no bends. Even if an issue does occur, its simple to repair. A small low-voltage wire leads to the switch, which may also help you track it down. Pouring Clorox (NOT POOL CHLORINE) should solve the problem. The air filter can also be located inside your furnace, and in that case, you will have to turn off the power at the breaker first. If this sounds familiar, Few homeowners rejoice at the sight of snakes in and around their house. This will help them understand the issue in a better way. My Nest thermostat indicated that there's no power, showing a problem with the red wire indicated in the photo. Step 3. Change the thermostat to the heat-only mode by disconnecting the Rc wire while leaving the other cables connected. Usually the issue is contained to the cooling side. 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. Replace the filter if it becomes filthy or clogged. Do the pictures hanging on your wall make you do a double-take when you pass by them? 1. Netflix Not Working on Samsung TV: Why & How To Fix! Same here. Ensure all breakers are turned off if the system has numerous ones. The E73 error on your Nest thermostat indicates that there is no power detected to the Rc wire. Insert the wire back into the Nest connector while ensuring that the connector button stays pressed down. 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. - YouTube 0:00 / 1:20 Nest thermostat. Do you find yourself wondering if its you or the picture thats not quite level? []. Disconnect only the Rc wire and examine it. If you connected a wire to your thermostat's C terminal and it caused your system to malfunction, you'll need. To confirm whether your thermostat wiring is faulty, you must deface your device and inspect the wiring. The fuse between the HVAC system and the thermostat device is blown. Tap again to open the Menu view. Your HVAC system might have multiple breakers throughout the circuit, so ensure all of them are turned off. Your HVAC system will cease providing electricity to your Nest thermostat when this occurs, resulting in the E73 error. Locate the drip pan. I charged the thermostat manually and it come on when plugged in, the says it has to shut down. Key Differences Between IMAX vs Others (2023), IMAX vs Standard: Difference Between Imax and Standard (2023). Because of this, your Nest Thermostat will Not Cool, and youll have to bear the stuffy weather. As a result, your Nest thermostat wont get electricity from your HVAC unit system, which may result in the E73 error being shown. The main drain line that drains the AC from the unit to outside the house was clogged baking up water in the drain causing the float switch to activate. Check The Air Filter Associated With Your Nest Thermostat, Check The Drain Tubes/Drip Pans For Your HVAC. The drip pan of the HVAC system is filled. Other reasons for the message include a clogged air filter or excess water build-up in your AC drip pan. Another suggestion from a previous member was to inspect the drain pan, the filters and the fuse. POSSIBLE RESOLUTION. I recently changed my 2 zoned home to 2 nest thermostats. Your thermostat is connected to a system that requires a C or common wire, but that wire isnt connected. You can describe your approaches to resolving the problem and how your thermostat is behaving now. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. This can affect the function of your air conditioner, the Nests power, or both. Changing the air filter every 3 months prevents it from clogging. In some homes, it will look like a light switch near the heating or cooling equipment. Your furnaces air filter may be inside, in which case youll have to cut off the electricity at the circuit breaker first. Depending on where your air handler is located, such as in the attic or a closet, the drain line may have been placed in various locations. Nest has several error codes that may appear on the screen to let you know something is amiss. Its also possible that there could be an issue with one of the batteries in your Nest thermostat, so you should replace them if necessary. Check that all the connections are tight and secure. Check your air filter with the following steps: As your AC runs, condensation forms, and the drip pan catches it. Plastic drain tubes link the drip pan to the cooling coils located beneath the drip pan. Clogged drain tubes have also shown this error in e73 in many ways. Her hobbies include pretending to be Joanna Gaines while updating her home with her husband and performing in local theater productions. Given below are the steps to address a blown fuse wire issue: Turn on the HVAC system once the blown fuse is replaced. 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. Summertime temperatures cause many AC systems to fail. https://support.google.com/googlenest/answer/9245516?hl=en. It would be best if you did not attempt to remove a sealed panel containing the cooling coils unless you are an experienced technician. Solving such an issue is more than simple; you need to access your breaker box and lift up the switch. I had that issue and could not get the system to turn on. To receive assistance with clearing your blocked drip, consult the water guide in your HVAC system or online. It is a perfect scope to share my different experiences about electronics and home theaters. Thus this is not uncommon. To check whether your HVAC system has a clogged filter or not and how to troubleshoot Nest thermostat, follow the steps below: I recommend changing filters once every 90 days to avoid these problems. Please see other consumer facing listing for more color options, Works with compatible Nest thermostats [1]; the sensor tells the thermostat what the temperature is in the room where its placed and the thermostat uses that reading to control when the system turns on or off to keep that room the temperature you like.Google Nest Thermostat Compatibility: Communicates temperature to compatible Google Nest thermostats up to 50 feet away. With temperature changes (this is in my attic) and vibration the connection between the fuse and the circuit board was not reliable. Home/Away Assist: don't heat or cool an empty home. A 24 VAC reading is normal and means the wiring is functioning properly. Loose wires other than the Rh wire can also cause that power doesn't go to the Rh wire. You may be prompted to look at the screen if your Nest starts acting up for unknown reasons. A "No power" alert can be caused by the following: The thermostat wiring is incorrect. So, are you here because your Nest showing an e73 error message, and you dont know what to do next? Disconnect your HVAC system from power by turning off your breaker. When I checked the thermostats display for any of the usual blinking lights, I saw the E73 error message and immediately decided to look it up online for some possible fixes to this problem. This can take up to 24 hours. Improper or insecure connections are the most frequent cause of the E73 error. This will help break down the clog. A full drip pan is the most common reason the AC wont turn on. Nest thermostat troubleshooting- No air conditioning. Once the water drained it left the float switch and AC came on. It would shut down automatically, the screen would go black, and the air conditioner would not cool the house. Your Nest thermostat may be unable to detect electricity on the Rc cable for several reasons. Check for loose wires. The condensation line overflow switch should have a small float at its base, which you should be able to easily move up and down. The system shuts down at this point to prevent overflow. Save my name, email, and website in this browser for the next time I comment. Always follow the wiring diagram the Nest app gives you during setup to connect your Nest thermostat. If you can do basic house electrical work, youll get through the problems with our basic fixes in the article above. Clean any mold or mildew that built up on the pan. Please let me know. Extreme hot weather and low voltage on the Rc wire are its main causes. Check the voltage of the Rc wire now using a voltmeter. No a/c, just a goodman gas furnace blowing into house thru vents. HowTL is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. It works again for a bit and then nothing. There are various reasons for no power supply to the Rc wire resulting in the Nest e73 error. 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 they are loose or disconnected, reconnect them and see if that solves the issue. I did that, but the Nest is still saying there's no power detected on the C wire or the Rh terminal. Remove the Rc wire and examine it. With regard to the other functional things, I will check the drain pan, the filter and the fuse. If you have a 24 VAC voltage, your wiring is OK, and the issue is with the AC unit, not the wiring. Googles Nest Thermostat is undoubtedly among the top programmable thermostats available on the market. 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??? The condensation overflow switch may be located next to the HVAC's air handler, near where the condensation drain exits the unit. Check to see whether the wire has been rusted or covered with paint. If you notice a clog in the drainpipe, pour -cup of distilled vinegar into the pipe and let it sit for at least 30 minutes. What software update? These troubleshooting solutions were culled from various sources on the internet, including blogs and message boards. But you need a C wire for the thermostat to run properly. What is IMAX? Nest maintains that you dont need a C wire for the thermostat to run. Typically, its found behind a grate either on the wall or the ceiling. The most obvious reason your system isnt receiving power is that the power is off! Yes, it was the float switch!!! Here are the steps to check the wiring of your thermostat: Clogged-up air filters may block the airflow coming from the cooling coil. Cleaning a blocked drip tube may be as simple as consulting an internet tutorial or the water guide included with your HVAC system. However, if none of these options work for you, it may suggest an issue with your Nest thermostat itself. Make certain that the drip pan and drip tube are free of water. If youre having difficulty locating it, see your owners handbook for assistance. Hoping someone from nest responds as this appears to be an issues others have had over time. This is because the provider can see all of the data that is being sent and [], There are various uses for the Ring Chime, which plays the sound of the Ring Doorbells chime to alert you when it is pushed. Or the second option is first to recognize the main cause and then fix it accordingly. Connect the wire back to the Nest connector when pressed down. On my system the fuse is on a small circuit board inside the HVAC unit. This occurs mainly due to extremely hot temperatures, burnt fuse, low voltage to the Rc wire, and much more. To avoid a water overflow, your heat pump systems or the air conditioner may switch off in this situation. Did you reboot by disconnecting it from the base and reconnecting? This usually happens because the wire isnt properly connected. Next, look for any dirt, dust, or clog but ensure to do so gently. 520 S Casino Center Blvd, Las Vegas,NV89101, If your Nest Thermostat battery is low, check this guide, Nest Thermostat No Power To RH Wire (E74 Error): How To Fix. Learn about the benefits of humidifiers, and get tips on maintenance and humidity control settings. Check to see if it hasnt burnt out. 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. The above solutions are usually enough to fix the E73 error message. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The fixes mentioned above are the best troubleshooting steps if your Nest thermostat detects an E73, i.e., no power fault on the RC wire. Nest thermostat has an error message reading NO POWER TO RC WIRE DETECTED. My new heat pump and Nest Thermostat was installed a year ago. Replace the fuse if you notice its burnt or discolored. It could also be located inside the furnace, in which case, youll have to turn off the breaker before removing it. Best regards, Now turn on the breaker to bring back the power. If you receive an E73 error message on your Nest, it means theres no power to the Rc wire. Im having the same problem. I did not. A professional can navigate the complicated system to avoid damage. Others, such as inspecting the cooling coils and drip tubes, are more complicated, and it is suggested that you seek the assistance of a qualified professional. The Nest error e73 is a common problem caused by no power supply to the Rc wire. The e73 Nest error message directs toward some problem with the Nests wiring, which hinders the power supply to the thermostat. Posted on Last updated: February 14, 2023. 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. Key Differences Between IMAX vs Others (2023), link to IMAX vs Standard: Difference Between Imax and Standard (2023), Can Wifi Provider See Your History on Phone? Once in a blue moon, however, a Nest thermostat may stop working and display a "lost power" message or another message which reads "no power to RC wire detected". 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. If you find it burnt or discoloured, it is damaged and needs to be replaced. Blink Camera is Registered To Another Account: What Should I do? A 24 VAC voltage indicates that your wiring is fine and that the problem is within the AC unit itself. Works fine and then error message and system turns off the AC. Make sure both are in the On position. Cut your electric bill, help the planet, and find the right thermostat setting for winter, summer, and everything in-between. Plastic drain tubes often link the drip pan and the cooling coils. I knew I had to find out how to repair it right away. These systems are incompatible with Nest thermostats. Lastly, put the thermostat back on the base and wait until the power gets on. Please note that for power loss problems not related to a condensation overflow switch, there may be a solution for your problem on the Nest troubleshooting page. At this time, you can test the voltage of the other wires just in case. Yes, it was the float switch! The wire should be inserted back into the Nest connection while maintaining pressure on the connector button. 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. Check the voltage to maintain the temperature as per your Ac. Usually, this message pops up when the wiring is incorrect or loose. It might also mean that the wire was incorrectly entered in the app. An Error code (such as E## or N##) should also appear. Remote control: Control your thermostat from anywhere using the Nest app. (For Insurance), Lost Schlage Programming Code? To do so, follow this step-by-step guide to ensure all the equipment in the thermostat has no defect that can cause such an annoying problem at your end. 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. This fixed my problem. Some mistakes, on the other hand, may appear impossible. Also anytime there was a power outage, when power came back, the nest was showing e73. In order to give the battery 24/7 power, a C wire is required. A couple of weeks ago, I found my Nest thermostat starting to show issues. You could have either an Rc or an Rh wire. And I'd add to that the float switch that shuts off the power to the thermostat. Answered in 8 minutes by: HVAC Technician: V12Tech V12Tech: Needless to say, I was hot and bothered. Your thermostat is connected to a system that requires a C or common wire, but that wire isn't. 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