Condition
AC Not Turning On After Winter
System worked last season but will not start now. Defrost board, capacitor, or rodent damage.
Possible Causes
Failed Defrost Control
A faulty board can cause the outdoor unit to freeze over in winter, blocking heat absorption.
Root Cause Analysis →Diagnostic Tests
- Check board LEDs
- Verify defrost sensor
- Test mode switching
Repair Options
Blown Start Capacitor
The capacitor provides the electrical 'kick' needed to start the compressor; without it, the motor won't turn.
Root Cause Analysis →Diagnostic Tests
- Measure microfarads
- Inspect for physical damage
Repair Options