Problem
The AC fan runs but the compressor does not start, meaning air may circulate but the system cannot cool the home.
Possible Causes
Failed capacitor
Bad contactor
Compressor overload tripped
Electrical issue at the outdoor unit
How To Fix It
Check thermostat settings
Inspect the breaker for the outdoor unit
Look for a swollen or leaking capacitor if visible
Turn the system off and restart after checking power
When To Call A Professional
If the compressor still will not start, an HVAC technician should inspect the capacitor, contactor, or compressor.