PROBLEM | CAUSE | SOLUTION |
Unit won't run | Power is off | Check wall plug. Check circuit breaker. |
| Bad thermostat | Call a professional. |
A/C unit won't cool air | Dirty filter | Remove grill and clean filter. |
| Clogged evaporator coils or clogged condenser coils | Vacuum coils. If necessary, scrub coils lightly with old toothbrush. Take care not to bend fins. |
| Shrub or other obstacle blocking air flow | Trim obstacle or move air conditioner to other location. |
| Bad fan motor | Call a professional. |
| Bad compressor | Call a professional. |
Unit won't blow air | Bad fan motor | Call a professional. |
Machine leaks | Drain plug clogged, preventing condensed water from escaping | Clear clog with screwdriver. |
| Improper installation | Unit should be installed so it tilts slightly to the outside to let water drain. |
Ice forms on coils | Dirty air filter | Clean filter. |
| Outside temperature below 60°F (16°C) | Defrost the coil by turning selector switch to Fan position. Let run until ice melts. |
Rattling noise inside unit | Condenser fan or evaporator fan is loose, hitting coils or housing | Remove cabinet, reposition fan and tighten screw at centre of fan. |
