ErrorCodeDoctor
Panasonic Air Conditioner H64 error code
The H64 error means your Panasonic air conditioner detected a fault with the outdoor high pressure sensor — the component that monitors refrigerant pressure on the high pressure side of the outdoor unit. This is an important safety sensor that protects the compressor and refrigerant circuit from dangerously high pressures. When it fails the unit stops operating as a safety measure. A qualified technician will need to inspect and replace the sensor.
Common causes
- Outdoor high pressure sensor has malfunctioned or failed
- Wiring to the sensor is loose or damaged
- Sensor is giving an out-of-range pressure reading
How to fix it
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1
Turn off the unit at the circuit breaker
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2
Contact a qualified technician to inspect and replace the outdoor high pressure sensor
Related Panasonic Air Conditioner error codes
H64 error — frequently asked questions
What does the H64 error mean on a Panasonic air conditioner?
The outdoor high pressure sensor has an abnormality
What causes the H64 error?
The H64 error is usually caused by: Outdoor high pressure sensor has malfunctioned or failed; Wiring to the sensor is loose or damaged; Sensor is giving an out-of-range pressure reading.
Can I fix the H64 error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the H64 error?
Fixing the H64 error on a Panasonic air conditioner typically costs $80–$250, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the H64 error?
We'd recommend addressing the H64 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.