If your air conditioner is not coming on after you replaced the condenser fan motor, there could be several reasons for this issue. Let's go through some common troubleshooting steps to help you identify the problem:
Double-check the installation: Make sure that the new condenser fan motor is installed correctly and securely. Check the electrical connections to ensure they are properly connected and tightened. Verify that the fan blades are installed in the correct orientation and not obstructed.
Power supply: Ensure that the air conditioner is receiving power. Check the circuit breaker or fuse box to see if the circuit for the air conditioner is tripped or if the fuse has blown. If it has, reset the breaker or replace the fuse. If it trips again or the fuse blows repeatedly, there may be an electrical issue that requires professional attention.
Thermostat settings: Double-check the thermostat settings. Make sure the thermostat is set to "cool" mode and the temperature setting is below the current room temperature. Sometimes, a simple thermostat misconfiguration can prevent the air conditioner from turning on.
Safety switch or float switch: Many air conditioning systems have safety switches or float switches that can shut off the unit if there is a water leak or condensate overflow. Check if any of these switches have been triggered due to water accumulation, and address the underlying issue if applicable.
Capacitor issues: The capacitor in the condenser unit provides the initial boost of power to start the fan motor. If the capacitor is faulty, the fan may not start even if the motor itself is fine. Consider checking the capacitor for any visible signs of damage or leakage. If you're not familiar with electrical components, it's best to have a professional HVAC technician inspect and test the capacitor.
Defective motor: Although rare, it's possible that the replacement condenser fan motor itself is defective. Test the motor separately to ensure it is working correctly. You can do this by connecting it directly to power (if you are experienced with electrical work) or by having a professional test it.
Wiring issues: Verify that the wiring is correct and secure. Incorrect wiring can prevent the fan motor from operating. Make sure you have followed the correct wiring diagram for your specific air conditioning unit.
If you have gone through these troubleshooting steps and still cannot identify the issue, it's best to contact a professional HVAC technician. They have the expertise and tools to diagnose the problem accurately and safely. Remember, dealing with electrical components can be dangerous, so always prioritize your safety.