Best Ways To Fix “Nest Thermostat Not Cooling” (2022)

If you have Nest Thermostat at home, and you are searching for the details of Nest Thermostat Not Cooling, how to fix it easily. Here we will provide the all details related to this.

Causes of Nest Thermostat Not Cooling

How To Fix Nest Thermostat Not Cooling?

Check the Wiring

Fix Nest Thermostat Not Cooling check wiring

Incorrect wiring of the thermostat can frequently cause issues. Because it worked all winter, you were unaware of a wiring issue. However, if the AC won’t run with the thermostat, poor wiring is likely to blame.

  • It’s possible for wires to short out and stop working properly.
  • Ineffective wiring frequently does not immediately result in issues. For a while, it might work, but eventually, the wire starts to come free and falls out.
  • One of the most common wiring issues is the C wire not being installed. The Nest is powered by this common wire.
  • Although it’s not always essential, it might result in issues that are comparable to the thermostat issue you’re currently having.
  • In the breaker box, turn off the power to the HVAC and the Nest. Remove the Nest from the wall and carefully inspect the cables.
  • If you see a loose wire, completely remove it from the terminal and re-insert it. There should be extra focus on the C terminal.

Related article:- How To Fix Nest Thermostat Delay?

Check and Repair

If your thermostat isn’t effectively cooling your home, the air conditioner is to blame. The majority of people are ignorant of how regularly an AC needs to be maintained in order to function correctly.

  • It requires fresh air filters every month, and the fan and fins shouldn’t be dusty.
  • In order for your AC to work, it needs to have enough coolant.
  • All of these AC issues are visible even during the day.
  • Your air conditioner should be thoroughly cleaned, and you should check to see if more coolant needs to be added.

Check Compatibility

Despite the fact that Nest thermostats often work with the majority of air conditioners, there is a chance that your AC won’t work with the thermostat. 

High voltage systems occasionally do not work with Nest thermostats. In order to determine whether there might be a compatibility issue, get in touch with your local Nest distributor and the air conditioner’s manufacturer. 

If there is a compatibility issue, you will need to choose a solution. The thermostat or the air conditioner may need to be replaced.

You can visit thermostats compatibility checker to know your device’s compatibility.

Restart the Unit

The best course of action if you can’t isolate the wiring problem is to restart the appliance. The wiring is without a doubt at fault for the majority of problems, however, that isn’t always the case. You should also take programming faults into account.

Even the most advanced gadgets, such as Nest thermostats, occasionally have programming errors. 

Therefore, turn off the unit’s power for around 2 minutes before turning it back on. When it comes to the vast majority of programming-related bugs, that will be it.

Check C-Wire System

A number of cables are located inside the Nest thermostat’s body. The thermostat won’t work properly unless each wire is properly put into its terminal. It’s possible that these wires got looser with time.

If the thermostat hadn’t turned on the air conditioner since installation, the wiring might have been installed incorrectly. The most important wire that must function flawlessly for AC activation is the RC (Red Cooling) wire. This cable may be scorched, harmed, or connected to the wrong terminal.

  • To inspect the wiring, terminals, and connections, particularly the RC wire, you must take the thermostat out from behind the wall.
  • Make sure the cables are in place correctly and are not harmed.
  • To activate the cooling feature of your HVAC system, the RC terminal must be connected.
  • If the thermostat has only one terminal designated “R” and neither the RC nor RH terminals, the R wire from the system must be attached to that terminal.
  • This R terminal is the 24-volt hot terminal.
  • The power is produced by the 24-volt transformer and passes via the thermostat before going to the other appliances.
  • Along with the R, RC, and RH connections, the Nest thermostat has other terminals that you should check.
  • One of the additional terminals that usually causes issues for your AC is the G terminal. It controls the thermostat, the Y terminal, the indoor blower fan relay, and the cooling relay in the condensing unit of your air conditioner.
  • When examining the wiring and connections, make sure to check each thermostat terminal.

Remove Auto Scheduling

Although the auto-scheduling tools may sound fantastic, they rarely function. To prevent issues with the cooling status, you must give up these functions. 

Simply log into the smart device and eliminate any configurations that might conflict with the temperature settings.

After that, manually lower the thermostat before letting the HVAC system take over. The HVAC will start cooling if the wiring issues are fixed. If the room is tiny, you’ll notice a reduction in temperature right away.

Determine Voltage Quantity

  • Click “Settings” on the thermostat’s display to view the voltage level.
  • After that, click on “Device Information”.
  • Choose “Power,” then “Battery Label”. Then, you will voltage quantity can be found.

You can also watch this video to completely fix “Nest Thermostat Not Cooling” issue

Final Thoughts

The NEST Thermostat heating and cooling systems rarely exhibit odd behavior. Therefore, if you are experiencing this issue as well, you may now resolve it by using the preceding approach. 

This manual should have been useful to you. In any case, feel free to get in touch with us in the comment section if you run into trouble when resolving this and need our help.

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