Not heating or cooling
The system runs but delivers little or no heating or cooling to the room.
Common causes
- Mode or setpoint configuration
- Air filter or indoor coil blocked
- Outdoor unit iced up or blocked
- Refrigerant charge issue
- Active error code preventing full operation
Safe checks
- 1Check the mode, setpoint and fan setting on the controller.
- 2Clean or replace the user-serviceable air filter.
- 3Clear leaves and debris from around the outdoor unit without opening it.
- 4Note any error code before calling a technician.
Related error codes
Brands commonly affected
When to call a technician
Call a qualified technician if the device repeats the fault after a manufacturer-approved restart, shows a burning smell, has damaged or discoloured wiring, or if the symptom involves the battery, inverter power stage or any sealed high-voltage component.