Step 3 test the connection between the thermostat and the power source.
How to test a attic fan motor.
Turn the attic fan off and unplug the motor from the thermostat.
Create a parallel circuit by placing the leads on.
It can sometimes be very confusing to test fan motors for people who don t have much experience.
How to test fan motor starting capacitors.
Step 2 test the thermostat.
How to test an attic fan motor.
Step 1 test the fan motor.
As you probably know fan motors can be designed for several different purposes most common of these are single phase motors.
Switch the analog volt meter from ohms to volts.
Look for a resistance reading.
This guide will hopefully make testing fan motors for you easy regardless of your experience level or type of fan motor that you are testing.
Disconnect the wires that supply power to the motor with appropriate screwdrivers.
A reading of zero means the fan motor winding is likely shorted and causing the breaker to trip or blow.
Once done test that the motor still works by.