Nest Thermostat No Power To RC Wire – How To Fix

By Max Anthony •  Updated: 08/23/23 •  7 min read

Nest Thermostat No Power To RC Wire

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Nest is a popular thermostat company that makes a wide variety of products, from the Nest Learning Thermostat to the Nest Protect smoke and CO alarm. This article will focus on the Nest Thermostat, which is one of the most popular devices made by the company. The Nest Thermostat is a smart thermostat that allows users to control their temperatures using a mobile app or a web interface. It can also be connected to other devices in your home, such as security cameras and smart switches, to help you manage your energy costs and protect your home from burglary. The Nest Thermostat is one of the most popular smart thermostats on the market, and it has received positive reviews from users who have found it easy to use and efficient at managing their energy costs. If you are looking for a smart thermostat that can help you save money on your energy bills, the Nest Thermostat is an excellent option.

The reason why a server will throw an error code E73 is because of bad or un-secure connections. You should disconnect the wires in your HVAC system from the main electrical circuit and follow the steps to test if they are connected properly. Disable your heating and cooling system by switching off your circuit breaker. If you have an HVAC unit with several breakers, be sure that all of them are off.

Detaching your display and taking out the wires that connect it will allow you to see the wiring that is attached to your unit. If you see any errors while examining the wires, that means that the wiring in your AC unit is fine. Reconnect the R-C wire and all the rest of the wires (remember to keep them all the same) and change the control to heat only.

This will allow you to check whether your wiring is correct or not. If it is fine, you can also do the same testing on the other wires. You should be able to see at the bottom of the conduit that there is at most 1 mm of copper. Try to maintain the wire without corroding it or painting it over.

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Test your thermostat by inserting a volt gauge into the thermostat base to see if it is producing a voltage that is the same as the one that comes from your electrical panel. If you have 24 VACUUM, it means that the electrical wiring is good and that the problem is with the AC unit. This problem is typical because hot weather causes a lot of cooling units to stop working.

Reconnect the damaged wire from the thermostat by re-securing the connector that it came with. To make sure that everything is functioning properly, you can also check the ground wires. Turn on the circuit breaker to allow the power to flow again.

If it is not functioning properly, just turn off the equipment and put your thermostat back in its base. If all else fails, simply place it in the base of your unit and allow it to start working again. You Might Want To Replace The Filter That is Linked To The Thermostat That You Use.

Nest Thermostat No Power To RC Wire

Unclean air filters

Unclean air filter can block your system’s ability to properly cool your home and may even force you to shut it down.

It is imperative that your system always receives a steady stream of clean air in order that it can run efficiently, and if your filter becomes clogged, you may have serious problems with the airflow that is being sent to the cooling coils, which could cause the system to stop working.

Change your air filter

Look for the filter located on your furnace or air conditioner. It is sometimes located near the breaker box, but in that case, you will have to shut off the power first. If you locate the filter on your system, you may also find it in the furnace. In this case, you may need to shut down the power to the breaker. If your air filter is clogging or is dirt, it is time to change it.

If it is a problem with a plugged-in drain tube or a clogged drain, it can cause your Nest thermostat to display the E73 error message. Its suggested that you change out your filter about once a month to avoid problems like this.

Clean The Pipes

That Drain Water From Your HVAC System. When a drain pan clogs or stops working, water can be pumped out of the unit and into the home. If you have a clogged drain pan, don’t try to remove it. If this occurs, the air conditioner will automatically shut down to avoid a water leak. This will eventually result in your thermostat not being able to read the error message that you are receiving.

Turn off the power to your system and drain the water

Shutting down the power source to your HVAC system will stop the system from working. You will need to completely unplug the system and reconnect it to the power source. If your system has many breakers, make sure that all of them are shut off.

Locating the correct coils for the HVAC system can be difficult, so consult an expert or refer to the user manual of the equipment you are using. If you are unable to access the coils because they are hidden behind a panel, do not attempt to access them by breaking the breaker.

It is located under the heating coils in the house, and is separated from the rest of the unit by drain tubes made from different types of flexible material. Check if drip pans are full and if the drain tube is not clogging.

If you see water, it means you have a clog in your drain tube. If you have not found a clog, it is likely to be a faulty air filter. You may find signs of water damage in your HVAC system such as rust, which indicates when water started to irritate the system. When you have a clog in one of your drip pans, you may need to get professional help to clear the water. If you can’t find the information you need, contact Nest Support.

Replace your HVAC fuse

When it is hot, your air conditioner will work hard. In such a case, your Nest thermostat will display an error. When you heat up the house, the fuses in the HVAC system can suddenly start to fail, causing you to lose power.

Turn off the power to your HVAC system and clean the drip pan

Turn down the power supply to your HVAC system by disconnecting the power cord and using a circuit breaker to disable the circuits that supply power.

Find and replace the fuse that controls your heating and cooling systems. If it is hard to find, consult the owner’s manual of the HVAC system to determine where the fuse is.

Check the fuse that is causing the power supply to your Nest thermostat to stop working. If the fuse is burned or discolored, it is likely that it is faulty and should be repaired or changed.Before you replace the heater fuse, reassemble the room and the other appliances you have disconnected. Then, turn the power back on to the HVAC system.

Nest support

If nothing works for you, your Nest thermostat is probably defective. If you follow the tips that we mentioned, the error code 73 should be fixed. But if all of them do not work, it could be that there is a problem with the Nest thermostat.

If you still have the E73 error, you may need to call Google Nest Customer Support to get the help that you need. If you have a problem with your Google Nest, let them know what steps you have taken and what you tried to solve. This will allow them to give you a more accurate idea of what is going on and help you get the help you need. This will help them to know if they have a good idea what kind of problem you are having and enable them to get the help they need faster.

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Max Anthony

Mainly Max Anthony is an athletics tutor & lives in Texas but that's not it. He's is also a music producer, content creator, record producer, writer, and session musician. He has been producing music and engineering at a lower level for over 5 years. His passions include quality music gear and that's what he loves to write about on HifiBeast. ( Shoot him an email now )