Is my current thermostat high or low voltage? I would like to install a nest?

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4 Answers

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  • 5 months ago

    If the thermostat wires are small, the size of dry spaghetti, then they are low voltage. If they are stiff, and the size of a pipe cleaner, then they are high voltage.

  • Droopy
    Lv 5
    5 months ago

    Go for it a hvac company will gladly fix what you burn up.

  • Anonymous
    5 months ago

    The picture is for the fan motor etc... The tstat is low voltage 18volts AC.

    This is too complicated for you to do. Sounds like you need a HVAC tech or electrician.

  • 5 months ago

    That looks like ratings for a motor or motor controller, full load and locked rotor are motor operating characteristics. Not really sure how it's relevant to a thermostat. It doesn't seem like a thermostat rating because the full load amps would only supply 500w of heat. You need to provide more details about where you see that label, and maybe the front or back of the thermostat.

    A line (high) voltage stat will have wires at least as thick as spaghetti, the terminals will be marked Line and load, or L1,L2 and T1,T2. There will be a junction box behind the thermostat. A line voltage thermostat will normally control 1 or 2 baseboards or wall mounted units of some type.

    Typically a low voltage thermostat is just connected to phone size wires comng through the wall and the stat will just be screwed to a cheesy little plate screwed to the wall. The terminals will be marked with letters like r,h,y,w,g. If you have gas or oil heat it is almost certainly a low voltage stat.

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