How to Check if Your AC Fan Motor is Bad in 7 Steps

When the fan isn't working properly, you won't feel the air coming out of the vents, and the A/C coil will eventually freeze. So if you want your air conditioner to work, it has to be in good shape.

Follow these simple steps to test your air conditioner's fan motor:

Step 1. Ensure the Thermostat is On

Is the thermostat on? Make sure the thermostat is on. do not laugh. This is one of the main reasons why people think their air conditioner isn't working properly.

Step 2. Check for Tripped Breakers

Are there any circuit breakers that have tripped? Locate the circuit breaker panel and check for the tripped circuit breaker. Each circuit breaker switch has three settings: On, Off, and Neutral. If the circuit breaker marked "A/C" is in the "off" setting, set it to neutral, then turn it back to "on".

Step 3. Replace Air Filters

Is the air filter clean? Check that the air filter is clean. Replace them if they are caked with dirt and debris. A clogged air filter can block airflow, causing a chain reaction. If they're clean, it's time to move on to step four.

Step 4. Examine Outside Fan

Is the fan spinning? Go outside and inspect the condenser unit (the big box located outside your home). You will be able to see the fan from the top. If the air conditioner is on, you should be able to hear the compressor (the humming sound when the air conditioner is running) and you should be able to see the fan blades turning. If the AC is on and the blade is stationary, you know there is a problem.

Step 5. Clear Fan Blades of Obstructions

Are the fan blades clogged? Go back inside and turn off the air conditioner. Then go back outside and insert a screwdriver or similar tool into the slit in the top of the condenser unit and try to move the fan blades with the tool. This is to check if they are spinning freely, or if there are falling branches or other things that might restrict movement.

Step 6. Try Kickstarting Fan Blades

Do they move on their own if you start the blades? If they move freely, go back inside, turn the AC back on, and start the fan blades with your tool again. If they start working after you start them manually, then the blades are working fine, the problem is with the capacitors (that's the AC part that makes the fan run).

Step 7. Inspect the AC Capacitor

Check the AC capacitor. For this, you'll need a capacitor tester (available at any hardware store). Power off the air conditioner.