ErrorCodeDoctor
Panasonic Air Conditioner F90 error code
The F90 error means your Panasonic air conditioner detected a fault with either the power factor correction (PFC) circuit or a communication error between the system microcomputer and the compressor microcomputer. Both represent serious electrical or communication faults in the outdoor unit. A qualified technician will need to diagnose the specific cause and repair or replace the affected components.
Common causes
- Power factor correction circuit in the outdoor unit has developed a fault
- Communication error between the main system microcomputer and the compressor control microcomputer
- Power supply abnormality affecting the PFC circuit
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 diagnose and repair the PFC circuit or compressor communication fault
Related Panasonic Air Conditioner error codes
F90 error — frequently asked questions
What does the F90 error mean on a Panasonic air conditioner?
Power factor correction circuit protection activated or compressor communication error
What causes the F90 error?
The F90 error is usually caused by: Power factor correction circuit in the outdoor unit has developed a fault; Communication error between the main system microcomputer and the compressor control microcomputer; Power supply abnormality affecting the PFC circuit.
Can I fix the F90 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 F90 error?
Fixing the F90 error on a Panasonic air conditioner typically costs $150–$400, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the F90 error?
We'd recommend addressing the F90 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.