DIY Home Improvement Forum banner

x wire

  1. X wire on old thermostat

    HVAC
    I am trying to install a programmable thermostat. I am going from a Sears Homart to a Hunter. I have only a gas heater with a HEPA filter. The old thermostat has three wires. Two I figured out (R and W), but there is an X wire that doesn't correspond to anything on the new. I've tried googling...
Top