Symptoms
Room temperature too high
Possible Causes
- Room thermostat set too high
- Superheat too high
- System low on refrigerant
- Coil iced-up
- Unit cooler located too close to door
- Heavy air infiltration
Possible Corrective Steps
- Adjust thermostat
- Adjust thermal expansion valve
- Add refrigerant
- Check defrost controls for malfunction
- Relocate unit cooler or add strip curtain to door opening
- Seal unwanted openings in room
