Verify the switch on the thermostat is set to fan or cool and make sure the air conditioner is turned on.
Central air condenser fan won t start.
To determine if the condenser motor is working use a multimeter to test the incoming voltage to the motor.
Examine all wiring and ensure that the unit is plugged in.
Your contactor is the middleman between the thermostat and your compressor.
Condenser fan runs backwards condenser fan won t start condenser fan runs slowly condenser fan noises condenser fan wobbles condenser fan runs intermittently or short cycles condenser fan won t stop condenser fan runs backwards.
The fan doesn t start at all.
If the condenser fan motor is receiving the correct voltage but the motor still won t run i.
This needs to be set below.
Make sure that the power is turned on and that the settings are calling for cooling.
Once the thermostat sends the command for cooling your contactor kick starts the process of starting your compressor.
Fan has trouble starting.
If your condenser unit won t turn on at all you may have a faulty motor or the unit may not be receiving power.
Nspect the capacitor to ensure that it is not at fault.
Check the temperature that has been set on the thermostat.
The condenser unit won t turn on.
If all the settings are correct but the fan doesn t start it could be an overheated or damaged fan motor.
If the fan doesn t start up at all it could be something as simple as a setting on the thermostat.
In general this problem is caused either by a dirty condenser and fan or a clogged condenser.