AC Capacitor Problems
The capacitor gives the AC motor the boost it needs to start and run. When it fails, the outdoor fan or compressor may not start.
Signs of a Failing Capacitor
- The outdoor unit hums but does not start.
- The system starts hard or not at all.
- The AC stops cooling suddenly.
- A bulging or leaking capacitor visible on inspection.
Why It Needs a Pro
Capacitors store an electrical charge and can be dangerous. Replacement requires a qualified technician. See AC capacitor replacement and AC contactor repair.
FAQs
What does an AC capacitor do?
It stores energy to help the motor start and run. When it fails, the outdoor unit may hum but not start.
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