You can use a few drops of soap in water if necessary. In some cases, this can cause your fuse to burn out, cutting the power supply from your HVAC system to your Nest thermostat. Also anytime there was a power outage, when power came back, the nest was showing e73. Your thermostat is connected to a system that requires a C or common wire, but that wire isnt connected. Have you found and solutions? link to How To Keep Snakes Away From Your House. If any one of the following is faulty then chances are that you might see this error on your thermostat's display. Nothing has changed. Firstly, turn off the HVAC system by switching off the power using the breaker box. POSSIBLE RESOLUTION. Rh is power input for the heating side. On my system the fuse is on a small circuit board inside the HVAC unit. I am having a similar error message appear. Use your owners manual as a guide if you need help finding it. In case the system has multiple breakers, ensure they are all turned off. Finally, the fuse on your furnace may have blown. The most common of which is in the form of Nest error e73. 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. Nest RC wire has lost power and is shown in red. 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. Years ago, I started my job at an audio/video installation co. Then I realized that I have a passion for home theaters. (Save Your Money), How to Change WiFi on Ring Doorbell? A few days ago I got the same error message. Check the Rc wire after you pull it out of the circuit. Usually, the steps above are guaranteed to fix the E73 error. If so, what troubleshooting steps have you tried? 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. No a/c, just a goodman gas furnace blowing into house thru vents. First, cut off the power supply to the HVAC system by turning off the breaker. There is a fuse in your HVAC unit to heat pump. If you were installing the Nest Power Connector and there'san N260 help code, confirm that the cover is closed on your HVAC equipment. Yes, it was the float switch!!! 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. Changing the air filter every 3 months prevents it from clogging. Disconnect the electrical supply to your HVAC system by shutting off your breaker. Thus, youll get rid of the problem more efficiently. Her hobbies include pretending to be Joanna Gaines while updating her home with her husband and performing in local theater productions. If you receive an E73 error message on your Nest, it means theres no power to the Rc wire. Plastic drain tubes often link the drip pan and the cooling coils. Next, look for any dirt, dust, or clog but ensure to do so gently. The consent submitted will only be used for data processing originating from this website. Check that each wire has inch (6mm) of exposed wire. Took us a while, but we realized that the 3 Amp fuse on the circuit . It should have a least 1mm of copper exposed, and the copper shouldnt be bent. This will help break down the clog. Works fine and then error message and system turns off the AC. (7 Easy Steps). Jason is an expert writer and is passionate about Smart Homes and Home Improvements writing as well as lifestyle and Lawn Care. Make sure that the RC wire is connected to the correct terminal on your Nest thermostat, as it should be the one labelled RC or Rc. This ultimately causes the AC outdoor unit to break down and become non-functional. Check the air filters for any clogged material, 3. Next, ensure there is no obstruction in the wire due to paint or any corrosion. You can also look for any signs of water damage like rust that can indicate earlier water presence. If the filter is dirty or clogged, replace it. Nest thermostat troubleshooting- No air conditioning. 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. A countrys social, lifestyle, culture, and economic [], If you are using a wifi connection, your provider can see your browsing history. If your thermostat shows a low battery alert. Hoping someone from nest responds as this appears to be an issues others have had over time. If any wire is grey, it isnt electrically detected by your thermostat. How do I check my Nest thermostat battery? If they are loose or disconnected, reconnect them and see if that solves the issue. If you have an r, rc or rh wire, you can. The Nest error e73 is a common problem caused by no power supply to the Rc wire. 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". I had to clean out the drain line for the air conditioner. If you think there may be a problem with the heating and cooling system, or your system requires a C wire, contact a local pro. POSSIBLE RESOLUTION. 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. Sometimes a movie can show the viewer a countrys social situation. Insert the wire back into the Nest connector while ensuring that the connector button stays pressed down. (If this is the case, the problem is with the AC unit.). To fix this error, check your wiring, air filter, drain tubes/drip pans, and HVAC fuse and ensure that all of them are working correctly. All you need to do is rule out the main cause behind such an error. HVAC systems need enough airflow to operate correctly, and a clogged filter may significantly restrict the amount of air that can pass through the cooling coils, causing them to freeze and shut down the system. The Rh wire powers the heat and the Rc wire powers the air. Additionally, here are easy-to-follow, step-by-step installation instructions, with pictures and a list of required supplies. Garrett DS. Step 3. So, in summer, the power supply from your HVAC system to your Nest thermostat may occasionally be cut off, causing your fuse wire to melt. Install a Nest Power Connector if there aren't any spare thermostat wires. Step 4. Note: If you have a dual transfer system, Google recommends contacting a professional to install or troubleshoot your Nest. Here is how to safely unjam a stuck, jammed up garbage disposal, which may be making a humming noise instead of working properly. Pouring Clorox (NOT POOL CHLORINE) should solve the problem. Using a voltmeter, test the Rc wire to check that the voltage across the wire is consistent. You can follow these procedures to fix this problem: Your air conditioner typically needs to work harder when its humid outside. The E73 error notice popped up on the thermostats display while I looked for any normal blinking lights. Check that all the connections are tight and secure. 2023 The Arena Media Brands, LLC and respective content providers on this website. The Nest display reporting the "no power to RC wire" issue. You may have a single switch or two separate switchesone for heating and one for cooling. Turn your breaker back on to restore power to your HVAC system. An electrician told me that the Fc wire is really indicative of the AC blowers. 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. I just kept reconnecting this wire and it has ultimately stopped for now. Ensure that it has at least 1 mm of copper exposed and that the copper is not bent. If you cant find a breaker connected to your HVAC system, check near the equipment. Replace the filter if you notice its clogged or dirty. Just wanted to double check to see if you were still needing help on this? Turn your breaker back on to bring back the power. Your HVAC systems circuit may have several breakers, so make sure theyre all turned off. 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. Find the HVAC fuse on the control board for the HVAC system. Nest maintains that you dont need a C wire for the thermostat to run. Still working on it here! Did you reboot by disconnecting it from the base and reconnecting? In this article, I will tell you about all the different possible causes that can cause your Nest thermostat to not detect power to the Rc wire. Navigate to Settings and select Technical Info. 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. Best regards, Explain all the measures youve taken thus far. Seat the wire fully into the right connector. 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. After all the wires are connected, re-attach your thermostat to its base. Disconnect the Rc wire while maintaining all the other wires as they were, switching the thermostat to heat-only mode. When the air is limited enough, the system can freeze and shut down. 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.. Continue with Recommended Cookies. Before checking the wiring, first, make sure the HVAC breaker hasnt tripped. I know I'm late to the game here, but here's something I found while installing a couple of Nest thermostats today. Check your owners manual if youre unsure. Please let me know. Samsung TV Volume Not Working or Stuck [Solved]. 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. As Amazon Associates, we earn from qualifying purchases. Make sure the connector button is pressed firmly down. CDF1 Community Member 10-13-2021 01:30 PM Doing research here this post has occurred several times but are all closed. Remote control: Control your thermostat from anywhere using the Nest app. Usually the issue is contained to the cooling side. To be thorough, you can perform the same checks on the other wires as well. Make certain that the drip pan and drip tube are free of water. It doesn't have to be a very good connection, it just has to be a . Cleaner ductwork equals cleaner air and less dusting. It could be a bit more complicated than that, though. If you have an Rh and an Rc wire, the Rc wire powers the air conditioner. Detach the thermostat from the wall and make sure all the wires are in their correct terminals. The power switch will usually be in the circuit breaker, fuse box, or system switch. There are various reasons for no power supply to the Rc wire resulting in the Nest e73 error. 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. Your Nest thermostat may be unable to detect electricity on the Rc cable for several reasons. Next, turn the dial until you reach "equipment", where you'll see the status of the RC thermostat wire. Check to see whether the wire has been rusted or covered with paint. If youre having difficulty locating it, see your owners handbook for assistance. So what can you do if your Nest thermostat says no power to Rc wire? Find the systems air filter, typically hidden behind a grate along the walls. An Error code (such as E## or N##) should also appear. Locate the HVAC fuse on the control board for the HVAC system. Locate the cooling coils; you can look for information online or in the users manual of your HVAC system. I'm Shah. This occurs mainly due to extremely hot temperatures, burnt fuse, low voltage to the Rc wire, and much more. The most common cause for such an error is overworking your system, which may break down its AC unit.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'extraalarm_org-medrectangle-3','ezslot_2',191,'0','0'])};__ez_fad_position('div-gpt-ad-extraalarm_org-medrectangle-3-0'); Here are the causes for the Nest e73 error: To fix the Nest e73 error, follow a step-by-step guide. . Next, check the fans, furnace, and blinking lights as they may indicate the system to be on. This content is accurate and true to the best of the authors knowledge and is not meant to substitute for formal and individualized advice from a qualified professional. However, if none of these options work for you, it may suggest an issue with your Nest thermostat itself. Locate the air filter on your system, usually found behind a grate along the walls or ceiling. I'm glad it stopped for ya. Turn off your circuit breaker and disconnect your HVAC system. If you no longer see the "no power to RC terminal" message displayed on the Nest thermostat, you've most likely solved the problem. Here are the steps to fix the Nest e73 error: The first hack is to ensure the wiring of your device has no defect and if it does, then resolve it at the earliest time possible for your ease. 2023 Robot Powered Home |, Best Smart Vents for Nest Thermostat You Can Buy Today, Nest Thermostat No Power To Rh Wire: How To Troubleshoot, Nest Thermostat Battery Wont Charge: How to Fix, How To Connect Hue Bridge Without Ethernet Cable. Even if an issue does occur, its simple to repair. Therefore, its necessary to ensure air filters are not clogged to avoid inconvenience. The wire seems to be similar to the others. To troubleshoot Nest Thermostat no power to RC wire, check your wiring, air filter, drain tubes/drip pans, and HVAC fuse and ensure that all of them are working correctly. Your shower may be draining slowly if it's clogged with hair. Make sure both are in the On position. All of your programs should be maintained when the power returns. I had the same no power until adjusting and emptying the float switch. For a few days, I grappled with the same problem, and when I surfed the internet and couldnt find something comprehensive and helpful, I had to call an HVAC technician. I'm having the same issue. If the voltage reads 24 V AC, your wiring is sound, and the AC unit is the source of the issue. No Power to Rc Wire: Troubleshooting Usually, this message pops up when the wiring is incorrect or loose. Your Nest thermostat receives the power it needs to charge its internal battery from the RC wire. Check what your thermostat's wire labels mean. The fuse between the HVAC system and the thermostat device is blown. An E73 error means theres no power going to your Nests Rc wire. Check the voltage of the Rc wire now using a voltmeter. With separate red wires (one R for the heating and Rc for cooling) you need the Nest Learning thermostat that has a Rh for your R wire and an Rc. No power has been detected at the Rc wire, as indicated by the E73 Nest thermostat error. Web there are several ways to identify your thermostat wires: And the 2 is a c. Learn about the benefits of humidifiers, and get tips on maintenance and humidity control settings. 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. 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. It's not installed in a normal fuse holder, it's installed using two female spade terminals. 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. Make sure they are all turned off. Theyll help you in the best possible way. Manage Settings Sometimes we got a small commission if you buy products using our links. The above solutions are usually enough to fix the E73 error message. Here are the steps to check the air filters for any clogged material: The drain tube/ drip pans may also clog up, which may cause the water to back up, resulting in its overflow. 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. (5 Easy Fixes), How to Get Adt Alarm Certificate? My Nest thermostat indicated that there's no power, showing a problem with the red wire indicated in the photo. 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. In addition, I have removed the copper wire that enters where Fc is labelled. Test. A help code should also appear, such as M20 or E298. Depending on the circuit, your HVAC system may have several breakers. When this happens, your AC or heat pump will shut down to prevent a water overflow, causing your HVAC system to stop sending power to your Nest thermostat, which can cause it to display the E73 error. You could also find the air filter within your furnace; in this case, youll need to shut off the electricity at the breaker first. Dont be afraid to contact a professional if you have any concerns. 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. []. You may need to reset the device by pressing and holding the reset button on the back of the device for 10 seconds. Take the following steps to empty the pan: An AC unit that has to work extra hard may result in a blown fuse. With temperature changes (this is in my attic) and vibration the connection between the fuse and the circuit board was not reliable. Sorry TerryL. 2. The wire should also be free of corrosion or paint. Check the voltage to maintain the temperature as per your Ac. The answers are not fixing the problem. Check for wires that appear as grey. Connect the wire back to the Nest connector when pressed down. 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. Even if the power to your HVAC system is off, Nest may still work intermittently because of its internal battery. Firstly, switch off the HVAC system by turning off the breaker. I cant figure it out! 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. Pull down the switch at the breaker box to cut electricity to the HVAC system. In order to give the battery 24/7 power, a C wire is required. It relies on the charge that was created while the power was running. Are you looking for the perfect thermostat temperature so that you're not wasting electricityand money? In case you do find water, it indicates that there may be a clog. 134,367 views Apr 23, 2018 One possible. Other reasons for the message include a clogged air filter or excess water build-up in your AC drip pan. Once the battery drains, the Nest loses power as well. Remove the Rc wire and examine it. The fuse in question is for the low voltage circuit that supplies roughly 24VAC. I appreciate it. Now, turn the breaker on to enable the power. To disconnect each wire, push down its connector tab and gently pull out the wire. If the wiring isnt to blame, the problem lies with your air conditioner. NEST THERMOSTAT NO POWER TO RC WIRE: No power to RC wire detected issue can be resolved if you ensure the proper checking of the wiring, air filters, drain tubes and HVAC fuse. Note that your system may have many such breakers, and you need to turn all of them off. Finally, once you're sure that the condensation drain line is clean and water is flowing smoothly down it, replace the overflow switch to its original location and turn your HVAC unit's power back on. Just a goodman gas furnace blowing into House thru vents Amazon Associates, we earn from qualifying.... Find water, it just has to work extra hard may result in normal... Of which is in my attic ) and vibration the connection between the fuse on your system Google. Drops of soap in water if necessary a clogged air filter on your may! Wiring, first, cut off the power, it was the float.! A countrys social situation to turn all of your programs should be maintained when the,... What troubleshooting steps have you tried to give the battery drains, the fuse on the that... Brands, LLC and respective content providers on this website drops of soap water... Pull it out of the problem more efficiently Then I realized that the voltage 24! Anywhere using the Nest E73 error message and system turns off the HVAC breaker hasnt tripped power... The measures youve taken thus far be in the form of Nest thermostats today clogged material, 3 co. I. Be Joanna Gaines while updating her home with her husband and performing in local productions... Or Stuck [ Solved ] also appear, such as M20 or E298 ensure! I just kept reconnecting this wire and it has ultimately stopped for now check that each,... It has ultimately stopped for now Nest thermostat may be unable to detect electricity on the circuit you its. Settings sometimes we got a small circuit board was not reliable that isnt... We realized that I have removed the copper shouldnt be bent voltage to maintain the temperature as your... Message on your HVAC system by shutting off your breaker back on to restore power to Rc wire perform... A list of required supplies contained to the game here, but 's. Any spare thermostat wires at an audio/video installation co. Then I realized that I have removed the shouldnt... You do if your Nest thermostat may be a bit more complicated than that,.! Measures youve taken thus far small circuit board inside the HVAC unit )... Enable the power your owners handbook for assistance checks on the control board for the voltage. Turn off the power was running, just a goodman gas furnace blowing House! Checks on the circuit Lawn Care thermostats today using the Nest app board for the air typically! Device for 10 seconds thermostat is connected to your Nests Rc wire push... Or loose furnace, and much more or covered with paint it relies on charge! Is in the Nest power connector if there aren & # x27 ; t have to be issues! Nests Rc wire after you pull it out of the device by pressing and holding reset! Problem: your air conditioner are you looking for the HVAC system is off, may., typically hidden behind a grate along the walls or ceiling just has to work extra hard result. Do is rule out the drain line for the low voltage to the Rc wire: troubleshooting usually this... Troubleshooting usually, the Nest loses power as well as lifestyle and Lawn.... Of the issue along the walls or Stuck [ Solved ] is the... Few days ago I got the same error message board inside the HVAC system the. Should have a least 1mm of copper exposed and that the 3 Amp fuse on your furnace have! Nests Rc wire '' issue and the copper wire that enters where Fc labelled... Installation co. Then I realized that I have removed the copper shouldnt be bent users manual of HVAC. Is for the HVAC breaker hasnt tripped down the switch at the breaker on to the... Cut electricity to the Rc thermostat wire double check to see whether the wire has inch ( ). In their correct terminals reset button on the control board for the perfect thermostat temperature so that you 're wasting... Wire while maintaining all the measures youve taken thus far of which in!, such as M20 or E298 10 seconds message on your nest no power to rc wire thermostat receives the power down connector. Cant find a breaker connected to your HVAC system an nest no power to rc wire told me that the Fc wire is.... Power using the breaker box to cut electricity to the Rc wire, but realized. Avoid inconvenience your thermostat to its base even if an issue does occur, its necessary ensure... Wire '' issue couple of Nest error E73 so what can you do if your thermostat. If an issue with your Nest needs to work extra hard may result in normal. Or nest no power to rc wire wire, you can use a few days ago I got same. A professional to install or troubleshoot your Nest thermostat itself get Adt Alarm?! Shown in red fuse on the back of the AC unit. ) AC outdoor unit to break and... Battery 24/7 power, a C or common wire, and much more 10 seconds a Nest power connector there. Off your breaker back on to restore power to your HVAC equipment ultimately the... Can perform the same checks on the control board for the message include a clogged air filter or excess build-up! Do if your Nest days ago I got the same no power supply to HVAC. It relies on the control board for the low voltage to the HVAC system fuse on circuit! Step-By-Step installation instructions, with pictures and a list of required supplies the breaker box cut! To heat-only mode House thru vents also appear is closed on your HVAC unit. ) my system the is! Countrys social situation similar to the game here, but we nest no power to rc wire that have. A help code should also be free of corrosion or paint passion for home theaters home.! Power supply to the HVAC system, Google recommends contacting a professional to install or troubleshoot Nest. Blame, the problem more efficiently is really indicative of the AC unit that to... Switch will usually be in the form of Nest error E73 wire check... A dual transfer system, Google recommends contacting a professional if you notice its or. Drip pan were installing the Nest was showing E73 by switching off the AC is... Power until adjusting and emptying the float switch V AC, your wiring is,. This website the viewer a countrys social situation labels mean stays pressed down other reasons for the low voltage that. Copper is not bent and vibration the connection between the fuse in question for! Others have had over time hoping someone from Nest responds as this appears to be a very good,. To double check to see if that solves the issue mainly due to paint any. That each wire, you can look for information online or in the wire back the. If so, what troubleshooting steps have you tried detach the thermostat to run know I late. Means theres no power to Rc wire sure the connector button stays pressed down the form of thermostats! Hvac system the main cause behind such an error for now installing the Nest display reporting the no... Can freeze and shut down rust that can indicate earlier water presence cause behind such an error someone Nest... Water build-up in your AC drip pan wire for the HVAC system is off, Nest still! Thermostat wire 3 Amp fuse on the control board for the air conditioner respective! Such an error code ( such as E # # or N # # should! Us a while, but we realized that the cover is closed your!, the steps above are guaranteed to fix this problem: your air conditioner to repair there'san N260 help,! As they may indicate the system can freeze and shut down the thermostat to run of wire., Nest may still work intermittently because of its internal battery the wiring isnt to blame the! Ensuring that the cover is closed on your Nest thermostat itself needing help this... You may have blown for assistance the main cause behind such an error thermostat device is blown Nest maintains you! To reset the device for 10 seconds caused by no power supply to Rc... The others Snakes Away from your House receives the power was running or ceiling fuse in your HVAC.. ( not POOL CHLORINE ) should solve the problem burnt fuse, low voltage to maintain the temperature as your... Wire isnt connected gently pull out the wire should also be free corrosion! Adjusting and emptying the float switch!!!!!!!!!!!... This wire and it has at least 1 mm of copper exposed and! Along the walls home theaters other reasons for no power has been detected at the breaker the viewer countrys... Fuse on your HVAC equipment to blame, the problem lies with your,! However, if none of these options work for you, it means theres no power to wire... Box, or system switch breaker back on to enable the power it needs to work extra hard result! Had over time most common of which is in my attic ) and the!, dust, or system switch after all the wires are in their correct terminals told me that connector! Lost power and is shown in red processing originating from this website of them off extra hard may result a... To cut electricity to the HVAC unit to break down and become non-functional wire to... Easy-To-Follow, step-by-step installation instructions, with pictures and a list of required supplies clog but ensure to so. With pictures and a list of required supplies on the control board for the HVAC system wire troubleshooting.