1. dirty condenser – clean the condenser coils and fan
2. temperature setting turned to low – turn temperature setting to colder
3. circuit breaker tripped – power spike – reset circuit breaker
4. compressor won’t start – failed capacitor – replace capacitor
5. defrost timer malfunction – replace defrost timer or computer control board
6. failed door seal – replace worn out door seal
7. failed compressor – replace compressor