Once done test that the motor still works by.
How to test a attic fan motor.
A reading of zero means the fan motor winding is likely shorted and causing the breaker to trip or blow.
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.
Switch the analog volt meter from ohms to volts.
Turn the attic fan off and unplug the motor from the thermostat.
If either of these conditions exists the fan motor needs to be replaced.
Create a parallel circuit by placing the leads on.
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.
Step 2 test the thermostat.
As you probably know fan motors can be designed for several different purposes most common of these are single phase motors.
Step 3 test the connection between the thermostat and the power source.
How to test an attic fan motor.
Let the wires that run from the capacitor to the motor.