Why is my AC fan not spinning but the compressor is running?

A failed capacitor is the most likely cause. The capacitor provides the electrical boost the condenser fan motor needs to start. Without it, the motor hums but the blades do not turn. Turn the air conditioner off right away. A compressor running without condenser fan cooling overheats and risks permanent damage.

How do I know if my AC capacitor is bad?

A bad capacitor produces a humming sound from the outdoor unit without fan blade movement. Visual signs include a bulging top, oil leaking from the casing, or scorch marks. Only a licensed HVAC technician should test or replace a capacitor. Capacitors store high-voltage charge even when power is off.

Can I replace an AC fan motor myself?

Fan motor replacement involves high-voltage wiring and capacitor discharge. The ESA requires licensed electrical contractors for work on permanently wired equipment in Ontario. Professional replacement takes 1-2 hours and includes motor matching, capacitor testing, and system verification.

How much does it cost to repair an AC fan that is not spinning?

Capacitor replacement costs $170-$350 in the GTA. Condenser fan motor replacement runs $300-$700. Smile HVAC's $120+tax diagnostic fee is deducted from the repair cost when you approve the work. The quoted price does not change after approval.

What causes an AC fan to stop spinning?

Five common causes: capacitor failure (the leading cause in Smile HVAC service records), fan motor breakdown, tripped circuit breaker, thermostat misconfiguration, and physical debris blocking the blades. Annual spring maintenance identifies worn air conditioner parts before they fail.

Is it dangerous if my AC fan stops spinning?

A stopped condenser fan causes the compressor to overheat within minutes. Compressor overheating can lead to refrigerant leaks, electrical burnout, and permanent damage. Turn the system off at the thermostat immediately. Do not try to manually spin the blades while the system is powered on.

How long do AC fan motors typically last?

AC condenser fan motors last 10-15 years with annual professional maintenance. Motors in systems that skip tune-ups fail closer to the 10-year mark. Bearing wear is the primary failure mode. Annual lubrication and capacitor testing during spring tune-ups extend motor life.