How can I tell if my thermostat is high or low voltage to install a Nest Thermostat?
- M JohnsonLv 66 months ago
If the wires are pliable and spaghetti thin then low voltage, if wires are stiff, three times larger in diameter, and using yellow or red wire nuts, high voltage, or 120v, line voltage, not high voltage.
- Anonymous6 months ago
In your other posy the picture is for the fan motor etc... The tstat is low voltage 18volts AC.
Seems this is too complicated for you to do. Sounds like you need a HVAC tech or electrician.
Hooking up the incorrect wires can do more damage than good. hooking up incorrectly you can damage the unit or the tstat. And that is not covered by warranty.
- Girlie ElectricsLv 76 months ago
Doesn't matter. Many thermostats can be used on both
What matters is the heating/cooling appliance.