What to do if the backup heater operation is not activated in Daikin Air Conditioner?
- JJames MarshallAug 19, 2025
Check and make sure that: * The backup heater operation mode is enabled. * The backup heater overcurrent fuse has not been turned off; if it has, check the fuse and turn it back on. * The thermal protector of the backup heater has not been activated; if it has, check the water pressure, whether there is air in the system, and the air purge operation, then press the reset button in the switch box.