In this article, we are discussing the Nest thermostat error code e195.
As per our research, this is an issue with the R wire of the thermostat.
When the R wire of the thermostat is not receiving power, you may receive this error.
Fixes For error e195 on Google Nest thermostat
Fix 1: Check the power supply to the Nest thermostat
The Nest thermostat needs a constant supply of power. This means that the power outlet that the thermostat is connected to should be functioning properly.
Check if the power outlet is working properly. You can check this by connecting any other electric device to the same outlet.
If the power outlet is not functioning, you can connect the thermostat to another outlet or get the earlier one repaired.
Fix 2: Check the wiring of the thermostat
Since the error code already means that there is an issue with the connection of the R wire, it is time that we open up the wiring to inspect if the R wire is connected properly.
To check any wiring-related issues on the thermostat, you will need to open the thermostat. Therefore, disconnect the thermostat from the power sources to make sure that it is safe to open and inspect.
If you do not know where to find the R wire, you can get the user manual where all the wires are shown with the positions. A simple online search about the model of your thermostat can also help locate the R wire.
Check if the connection is secure and if you find it to be loose, you can reconnect the R wire.
Fix 3: Check the circuit of the thermostat
It is possible that the R wire of the thermostat is connected properly but the circuit of the thermostat is not complete.
This means that the power from the R wire will not reach the entire circuit and hence, it will not be detected on the thermostat. Check if all the wires on the thermostat are connected properly.
If there are any broken wires in the circuit, remove them immediately and replace them. Not only is this essential for the circuit but also to evade fire hazards.
Fix 4: Check the float switch on the thermostat
The float switch on the thermostat should not be tripped. This can be a cause of concern for the non-detection of the R wire.
The float switch is inserted in the mechanism for safety purposes. If the condensation on the thermostat goes beyond the permitted level, the float switch may gets tripped to stop the process.
Check if the float switch is tripped. If it is, replace the switch and also call someone to take care of the condensation process on the thermostat.
Fix 5: Call in an experienced person to check the electrical circuit
Since the processes of the thermostat are a little complicated, there is a certain threshold to which you can interfere in the process of repairing the appliance.
If you feel at any point that the issue is too complicated for you to solve, it is better to reach out to the professionals.
