There are two main reasons that a heating system may not be compatible with nest thermostat.
Nest not compatible with high voltage.
High voltage thermostats should only be installed or uninstalled by a professional due to the high voltage that they.
The 2018 nest learning thermostat 3rd generation is not only compatible with high voltage systems but it works as your best friend who is an agoraphobe and never leaves the house.
It s high current or a proprietary system.
While most heating systems are high voltage usually 230v usually they only use a little bit of current at a time up to 3a.
In some cases it is possible to make a high voltage system nest compatible.
The rest of the heating and cooling systems detailed in this article are not compatible with mainstream smart thermostats.
You might have a line voltage 120v system if your wires are thick and either 2 or 4 in quantity probably just two or four red and black or red and white in color you operate your heater s on a room by room basis.