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Panasonic Mini-Split Error Codes: Complete Reference (2026 Guide)

by Dua Jones April 28, 2026

Panasonic mini-splits display fault codes as alphanumeric codes on the indoor unit's LED display or via the wired remote controller. Panasonic's error code system is consistent across their ductless lineup and well-documented in their service manuals. This guide covers the most common Panasonic mini-split error codes, their meanings, and recommended first responses.

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Common Panasonic Mini-Split Error Codes

Error Code	Meaning	DIY Fix?	First Step
H00	No fault — normal operation	N/A	No action needed
H11	Communication error (indoor to outdoor)	Partially	Reset at breaker; check signal wire connections
H12	Mismatch between indoor and outdoor capacity	No	Call technician — verify unit pairing
H14	Indoor intake temperature sensor fault	No	Reset; call tech if recurring — thermistor
H15	Compressor temperature sensor fault	No	Call technician — thermistor replacement
H16	Outdoor current transformer fault	No	Call technician — electrical component fault
H19	Indoor fan motor locked / fault	Partially	Check for obstructions; call tech if clear
H23	Indoor coil temperature sensor fault	No	Call technician — thermistor replacement
H27	Outdoor temperature sensor fault	No	Reset; call tech if recurring
F11	Reversing valve fault	No	Call technician — reversing valve replacement
F17	Freeze protection — indoor coil temperature too low	Yes	Clean filter; thaw coil 2–3 hrs; restart
F90	High pressure protection	Partially	Clear outdoor unit airflow; reset at breaker
F91	Low pressure / refrigerant issue	No	Call EPA-certified technician — refrigerant leak check
F95	Outdoor high pressure protection (alternate)	Partially	Clear outdoor unit; reset; call tech if recurring
F96	Compressor overload / heat sink overheat	Partially	Clear outdoor unit airflow; reset; call tech if recurring
F97	Compressor discharge temperature too high	No	Call technician — refrigerant or compressor issue

How to Read Panasonic Error Codes

Panasonic uses H-prefix codes for indoor unit faults and F-prefix codes for outdoor unit or refrigerant circuit faults. Units with a wired remote controller or display show the code directly. On wireless-remote-only models, press the CHECK button (if available) to display the code. Some Panasonic models require connecting a service tool to retrieve codes — in that case, contact a Panasonic service technician.

Frequently Asked Questions

What does Panasonic error code H11 mean?

H11 is a communication error between the indoor and outdoor unit. Try a breaker reset first (off 30 seconds, on, wait 3 minutes). If H11 returns immediately, inspect the communication wire connections at both the indoor and outdoor unit terminal blocks — a loose or reversed wire is the most common cause of persistent H11.

My Panasonic shows F17 — is that serious?

F17 is the freeze protection code — the indoor coil temperature has dropped too low, typically due to restricted airflow from a dirty filter. Clean the filter, turn the unit off for 2 hours to let any ice melt, then restart. F17 should clear. If it returns after cleaning, reduced airflow from a fan motor issue or low refrigerant may be the cause.