How to fix a dead blower motor?

Fixing a completely dead residential indoor air handler blower motor typically requires full replacement, because internal motor windings and sealed electronic modules cannot be easily repaired once burnt out. However, before purchasing a brand-new motor, you should perform thorough troubleshooting to rule out external electrical failures. First, turn off power at the breaker and inspect the motor's run capacitor; a swollen, leaking, or dead capacitor will prevent the motor from starting, and replacing a twenty-dollar capacitor will instantly revive a seemingly dead motor. Second, check for a tripped thermal overload switch or blown control fuses. Third, verify that line voltage reaches the motor terminals. You can troubleshoot safely with a multimeter. You can verify that your repair was successful when replacing a bad capacitor or installing a new blower motor restores powerful, quiet airflow throughout your home's supply vents.