AC Not Blowing Air

Quick answer

If your AC isn't blowing air, check the air filter, thermostat settings, and ensure the fan is set to 'on'. Turn off the power before inspecting internal components.

Confirm the symptom

• AC is not blowing air at all
• Airflow is weak or barely noticeable
• AC runs but no air comes out of vents

Tools and prep

• Screwdriver set
• New air filter (if needed)
• Thermometer
• Flashlight
• Safety gloves
• Turn off power to the AC unit at the circuit breaker

Step-by-step troubleshooting

1. Check Thermostat Settings
   Do: Verify the thermostat is set to 'Cool' and the fan is set to 'On'.
   Observe: Thermostat settings match cooling mode and fan operation.
   Means: Thermostat is functioning correctly.
   Next: If settings are correct, proceed to step 2.
2. Inspect Air Filter
   Do: Remove and inspect the air filter for dirt or blockage.
   Observe: Filter is dirty or clogged.
   Means: A dirty filter restricts airflow.
   Next: Replace the filter if dirty and retest the system.
3. Check Fan Motor and Belt
   Do: Open the AC unit and inspect the fan motor and belt for damage or wear.
   Observe: Fan motor is not running or belt is broken.
   Means: A faulty motor or broken belt prevents airflow.
   Next: If the motor or belt is damaged, replace them.
4. Inspect Blower Wheel
   Do: Check the blower wheel for obstructions or damage.
   Observe: Blower wheel is blocked or damaged.
   Means: Obstructions or damage prevent proper airflow.
   Next: Clear any obstructions or replace the blower wheel if necessary.
5. Check Capacitor
   Do: Inspect the capacitor for signs of bulging or leakage.
   Observe: Capacitor is swollen or leaking.
   Means: A faulty capacitor can prevent the fan from running.
   Next: Replace the capacitor if damaged.
6. Test Circuit Breaker
   Do: Check the circuit breaker for the AC unit to ensure it is not tripped.
   Observe: Breaker is tripped or shows signs of damage.
   Means: A tripped breaker interrupts power to the unit.
   Next: Reset the breaker and test the AC again.

Common causes

Parts matching

Common parts needed to fix an AC not blowing air include:

• Air Filter
• Fan Motor
• Belt
• Capacitor

Always ensure the power is off before replacing parts to avoid electrical hazards.

When to call a professional

• If the fan motor or capacitor is damaged and you're unsure how to replace them
• If the AC still doesn't blow air after replacing filters, belts, and checking settings
• If you smell burning or hear unusual noises from the unit
• If the circuit breaker continues to trip after being reset

FAQ

Related guides

• ac not cooling
• ac not blowing cold air

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