Thermostate kicks pump motor on ok. but when its time for the fan motor, all you here is a loud humming then the breaker blows
Fan motor is not seized up
Heating & Cooling - Mastercool - 67680 Evaporative Cooler Air Conditioner
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Answers & Comments
Check for a failed start/run capacitor for the motor
if the motor spins freely then the humming will be a frequency hum because there is not enough power to start the fan running
the extra current will blow a cb