Panasonic · Air Conditioner

Panasonic Air Conditioner H27 error code

Difficulty: Hard · Cost: $80–$200 · Duration: Requires professional service

The H27 error means your Panasonic air conditioner detected a fault with the outdoor air temperature sensor — the component that measures the ambient temperature outside. This reading is used to adjust the unit's operation based on outdoor conditions. When it develops a fault the unit cannot optimise performance correctly. A qualified technician will need to inspect and replace the sensor.

Common causes

Outdoor air temperature sensor has malfunctioned or failed
Wiring to the sensor is loose or damaged
Sensor is giving an out-of-range reading

How to fix it

1

Turn off the unit at the circuit breaker and wait 5 minutes then try restarting
2

If H27 returns contact a qualified technician to inspect and replace the outdoor air temperature sensor