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Nest Thermostat Cooling Problems/Troubleshooting

Keeping your house equipped with the most advanced technology goes far beyond having the best TVs, gaming systems, and even security systems. If you want to keep your house smart, the Nest thermostat is the way to go, but what if this device stops working properly?

If your Nest Thermostat is having cooling problems and you are in need of a few troubleshooting methods, try rewiring any wires that have been improperly connected, reset the thermostat, check that all wires have been securely connected, and add a C-wire to the device.

Adjusting the thermostat cooling

For those without programmable thermostats, it can be a challenge to navigate how to use this device when temperatures are changing outside, the need for cool and hot hair differ from day to day, and when you are away from your home for long periods. The Nest thermostat helps to change all of this by adapting to your daily habits and programming to adjust accordingly. What, then, do you do if your Nest thermostat is experiencing cooling problems?

Nest Thermostat Cooling Problems/Troubleshooting

Outside of the Nest thermostat being programmable to fit your exact lifestyle, another huge advantage is that this system, due to its smart design, is able to save owners money on heating and cooling every single year. Through the Eco Temperature setting, the device senses when you are away and will conserve energy. However, if you notice that the Nest isn’t cooling your home properly, what can you do to get things working again through troubleshooting methods?

If your Nest thermostat is having cooling problems, it could be that the system has been wired incorrectly, causing issues with the cooling system. If this is the case, the wires will need to be rewired to the correct position and once reconnected, checked to see if the system is working properly.

To change the wiring in your Nest thermostat to be in the right position, you will need to first disconnect power from the Nest by turning off the circuit breaker to that specific room. Once turned off, remove the display screen from the Nest, where you will then see all of the wires to the system. You will then disconnect any wires that are improperly connected and be sure to place them in the correct position with a new label before restoring power to the device.

Nest Thermostat Not Cooling

Nest thermostat cooling on the wall

If you are in the middle of a hot summer afternoon and come inside for a reprieve from the stifling heat, you may be a tad surprised when you notice that the air inside your home offers little relief. If you go to your Nest thermostat and see that it is not cooling as it should, alarm might set in and the gears in your mind will start turning to find a solution. If you have a Nest thermostat and it is not cooling, take a look below to find the fix to get things cooled off.

If your Nest thermostat is not cooling, it could be that the thermostat simply needs to be reset. To do this, cut off power to the thermostat and allow it to sit for five minutes. Once this time has passed, restore the power by turning the fuse back on and wait to see if cooling ensues.

If you reset the thermostat and Nest is still not cooling your home as it should, you may need to check the wire connection as mentioned in the previous section titled “Nest Thermostat Cooling Problems/Troubleshooting.” When you are looking for wires that are not connected to the correct port, also be sure to check that all wires are free of any damage and that they have all been inserted secretly. If a wire is loose, this can cause immediate cooling issues.

Nest Thermostat Keeps Delaying Cooling

Nest thermostat cooling on the wall

Nest thermostats are smart devices that can be programmed to fit your life exactly as you would like it. This means being able to change the temperature from your phone, reset your preferences, switch it into a different mode when you are away, and delay heating and cooling. However, if you don’t want cooling to be delayed, yet your thermometer continues to do so, what can be done to get cooling started in your home and what might be the cause of this?

If your Nest thermostat keeps delaying cooling, this is likely due to the device not getting enough power to operate. This can be resolved by adding a C-wire, which is an adapter that keeps the Nest thermometer supplied with plenty of power, causing the ‘Delayed’ message to go away.

The Nest thermometer does not actually run off of power lines, but is supplied with power through a rechargeable lithium-ion battery. This may make you wonder how it is recharged if it is within the walls of your home, but the battery gets recharged through your HVAC system, and at times, this system simply does not supply enough power to keep it running. Therefore, by adding a C-wire, you are able to provide consistent power and resolve any delayed cooling.

Nest Thermostat Says Cooling But Not Air

Smart thermostat in living room

Nest is a smart device in many different ways, but one of the best features of this type of heating and cooling system is that it relays exactly what is going on with the device with simple colors and messages. When your home is cooling, you will notice that the display on the Nest turns blue, which should then be followed by air coming from your system. However, if you see that the thermostat is cooling but there is no air, take a look below to find out what is going on.

If your Nest thermostat says that it is cooling but there is no air coming from your vents, it could be that the thermostat has been connected to an incompatible system. Nest works with most 24V systems, but if your particular system is a problem, adding a C-wire will be the fix.

Installing a C-wire can be done without the need of a professional, but it should be noted that this process takes a bit of time and must be done perfectly for the connection to be made and the wire to work as it should. If you have doubts about your efficiency, your ability to install, or are somewhat confused by the steps given to install a C-wire, consider hiring a professional. They will also be able to inspect the Nest and ensure that all is working exactly as it should be.

Nest Thermostat Won’t Stop Cooling

Smart thermostat in living room

With any thermostat, there is going to be a temperature that is set which is the goal of your heating and cooling system to reach. Once this temperature has been reached, the system will shut off and will then restart when there has either been an increase or decrease in the target temperature, but the system should never run continually. If you have a Nest thermometer and it won’t stop cooling, take a look below to see what you can do to troubleshoot this issue.

If your Nest thermometer won’t stop cooling, you want to first start by seeing if the system will shut off when manually forced. To do this, go to the Nest and turn off the device. To do this, on the home screen click on your thermostat and select ‘Mode’ then choose ‘Off.’

Once you have selected off, give the system a few moments for the command to register and shut itself down. If after three minutes, your system is still running, you will need to cut power from the Nest and remove it from its base so that all wires are exposed. You will then remove the wire from the G terminal and if the Nest shuts off upon this removal, it is an indication that the device is bad and will need to be replaced with a new, unaffected model.

If you remove the wire from the G terminal and the fan continues to run, this is an indication that the problem does not lie within the Nest, but actually exists within the HVAC system. If this is the case for you, you will need to call a professional to come and inspect what the cause of your continually running system is.

Nest Thermostat Not Showing Cool Mode

Nest thermostat cooling on the wall

When accessing the display screen of your Nest thermostat, you should be able to see a few different options when it comes to temperature: heat mode, cool mode, eco mode, and off. However, if you go to set your thermostat to cool mode and notice that this option is missing, you might find yourself scrambling to figure out how to get this mode restored back on the screen and thus, back in your home. If you cannot see this option, read on to see what to do.

If your Nest thermostat isn’t showing cool mode, this is likely because the thermostat is no longer detecting the cooling wire. To reconnect the cooling wire, you will need to turn off power to the thermostat and reset the Y1 wire by removing it and inserting it again securely.

When you can confirm that the Y1 wire is securely in place, you can then reattach the face of your Nest thermostat and turn the power back on to the area. Allow the thermometer to have enough time to power back on, then check the on-screen menu once again to see if it displays the cool mode option. When you see this option, select it and allow a few seconds for your system to start working for confirmation that the selected to effect.

Nest Thermostat Not Cooling After Power Outage

Shocked woman

Although Nest does not run off of power lines like other conventional thermostats, it does run off of the power that comes from your HVAC system. Therefore, when you find yourself in the middle of a power outage, the Nest will shut down and will not power back on until power has been restored to your home or business. If you experience a power outage and your Nest thermostat is not cooling once power has been restored, what might be the problem?

If your Nest thermostat isn’t cooling after a power outage, you may need to reset the external and internal breakers in your home. To do this, turn the Nest off and flip the breaker off and back on from the breaker box. After this, you will wait 30 minutes while the AC resets.

Once the 30 minutes have passed, you will then turn Nest back on and select the option for ‘Cool Mode’ which should cause the system to restart. Once this has been selected, allow the system a few moments to receive the message, then you should begin to hear air coming from your vents and eventually feel the air getting cooler.

If your Nest Thermostat is having cooling problems and you are in need of a few troubleshooting methods, try resetting the Y1 wire within the Nest for any issues with the device not displaying ‘Cool Mode,’ and reset your external and internal breakers in the case of a power outage.