You might need a new fan center relay if your furnace is equipped fan sequencer or furnace control board.
Rheem furnace blower motor wont turn.
If the blade turns freely test the incoming power to the fan motor.
Turn the power to the furnace off and disconnect the wires from the thermostat.
Tie the red and white wires together and switch the power on.
Turn heat to off.
If the blower motor is burned out replace it.
Next you will turn your thermostat to the fan only mode.
Check your blower motor if your furnace still won t turn on you don t need to know what a blower motor is to check that it is working properly.
Motor humming without turning if your furnace blower motor hums when it s switched on but at the same time does not actually turn the capacitor may be damaged.
Limit switch issue furnace blower fan wont turn off if the furnace overheats then a limit switch will open.
A sequencer looks like the picture below.
If your furnace won t turn on go to your furnace if it is accessible to you and peak in the little plastic window on the side of it most modern furnaces will have a window.
The blower motor blows air through the return vent past the heat exchanger and into the home s venting.
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This problem of getting a humming noise along with little to no spinning is very common with motors that do not have good quality capacitors.
Replace the wire or thermostat to fix the problem.
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First make sure that power is getting to the motor.
If the motor bearings are worn out replace the motor.
On 2019 12 28 by jamie.
To check your furnace s blower fan for proper operation start by turning your furnace to the off position.
Sometimes my blower fan won t shut off for a while.
If the blade does not turn freely this indicates that the motor bearings are worn out.
There are a couple of ways to do this depending on your thermostat but the two most common are.
If the furnace starts the problem is either with the thermostat wire or thermostat.
That will cause the burners or heat source to shut off and the fan to run until the limit switch closes again.
In some cases the limit switch will stick open and this will cause the fan to run continuously.
If power is getting to the fan motor but the motor won t run this also indicates that the motor is defective and should be replaced.
