When I turn on the air the fan and burners come on. When I select heat I can hear the condenser with no fan, it's like the delay you experience with the fan coming on when it gets to temp. I've tried resetting the thermostat and that doesn't work. Batteries are fine. Could my thermostat be bad?
Not likely to be a bad thermostat, what model is the thermostat and heater?
Testimonial: "Found solution, two wires not in the right place. thermostat is fine. Thanks for the response."
SOURCE: New honeywell thermostat on new gas furnace not working
sometimes there's a differential setting anywhere from 1-3 degrees, see if you can make sure it's down to 1
SOURCE: I have a similiar problem to this one...
Sure sounds like the t-stat is bad having to throw the switch on and off to get it to work. Try to find a White Rogers brand they are the best.
SOURCE: My heater is not working reliably. With the
could be an open or stuck limit switch, not really a good thing.
SOURCE: unit turns on but furnace won't come on. AC works,
see if your t-stat is calling for heat take a jumper wire from terminal r to w on the board if the heat comes on replace the t-stat
SOURCE: Carrier furnace fan works in
First take off the thermostat cover and turn off power to unit jump the R,G Y wires at the thermostat subbase with power back on, if the fan starts up then the thermostat is bad and must be replaced. If it still does not start then the relay on the control board is bad and must be replaced.
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