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On this page, you will find more information about the most common causes and most relevant solutions for the Nest error 'E155'. Do you need help straight away? Visit our support page.
The Google documentation indicates that error code 'E155' is caused by the following problem: "No heating or cooling detected W1 or Y1 wire is required".
Do you think there is another cause for this error? Let others know in the comments.
We've created a list of solutions which you can follow if you want to solve this Nest problem yourself. Do you need more help? Visit our support page if you need professional support with Nest right away.
One of the most common errors that you might encounter when you try to use Google's services is Google e155 error. This error occurs when you try to access your account information or when you try to log into your account on the internet. This error can be annoying and frustrating because you cannot access the services properly.
The problem can be caused by an issue with your device system. If the system is in trouble, then it is possible to stop sending power to the thermostat. Another possible reason is that you live at a very high or low temperature place so this code appears. To fix this error, you need to try a few solutions.
First of all, error e155 typically indicates that there is no heating or cooling detected, similar to error e75. However, it is also possible that you have a cooling system fault. In addition the W1 or Y1 wire is required to function.
You can check the system power then check the wire and make sure it is properly connected. Check all connectors and wires on the compressor and make sure they are not bent or cut. Check all connectors on the control board for corrosion or any broken connections.
If there is no heating or cooling then you can replace the thermostat. However, if there is heating and cooling then check the wiring harness for broken or loose connections. Make sure all connectors are properly installed and have not been damaged.
Make sure the thermostat control board is installed properly in the compressor. It should be located at the bottom of the compressor between the condenser and the fan motor. If it is installed in a different location then it is possible that the system will not function properly.
Lastly, another solution you can try is to contact the Customer Service to solve this error. You can try contacting them through their customer support number or their website. The customer support will usually ask you to send them the error code that is appearing on your screen. They will tell you what to do next for your problem and give another solution.