Don't bother with that switch yet. IF your heat is by hot water or steam (radiators or baseboards) and the thermostat is set well above room temperature and the boiler never turns on, See NO HEAT - BOILER to continue diagnosing and fixing the no-heat problem. Check that the ...
the location of the exhaust duct termination also can be a source of noises that re-enter the building. If the exhaust vent terminates close to other mechanical equipment such as an air conditioner or heat pump compressor unit or if it terminates at a noisy sidewalk or street, those noises ...