Try turning the fan to on using the fan switch on the thermostat to test for power to furnace.
Bryant furnace fan not working.
If both the compressor and the fan motor won t run use a multimeter to test the temperature control thermostat for continuity.
Check the ssu switch it looks like a light switch on a gray box located at the furnace to be sure it is in the on position.
Now put your furnace s blower fan to the test.
You might need a new fan center relay if your furnace is equipped fan sequencer or furnace control board.
Sequencers are used most of the time in air handlers heat pumps electric furnaces to control the fan blower and turn on the electric heaters in a sequence so the electric heaters to do come on all at the same time.
If the furnace starts the problem is either with the thermostat wire or thermostat.
If the thermostat.
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Start by turning the furnace off turn your thermostat to fan only and wait a few minutes.
Your furnace blower fan not starting can have a few causes as you see here.
A sequencer looks like the picture below.
Replace the wire or thermostat to fix the problem.
If the fan does not start you have a wiring issue circuit breaker trips or motor problem circuit breaker does not trip.
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Turn the power to the furnace off and disconnect the wires from the thermostat.
Check the circuit breakers at the electrical panel.
Check to ensure the furnace filter isn t in need of replacement.
Tie the red and white wires together and switch the power on.
If the compressor is running but the fan motor is not running the fan motor or the fan motor capacitor are likely at fault.
Does not have continuity replace it.