Panasonic Heat Pump Error Codes — Meanings, Causes & Repair in Greater Vancouver

Seeing a fault code on your Panasonic heat pump? This guide explains what the most common Panasonic heat pump error codes mean, what’s safe to check yourself, and when to call HeatLand’s licensed HVAC technicians for Panasonic heat pump repair across Metro Vancouver and the Fraser Valley.

The codes below apply across common Panasonic models (Exterios, Exterios E, Exterios Max, ClimaPure XE, ClimaPure). Meanings follow Panasonic’s documented fault codes — always confirm against your unit’s own manual, because exact wording can vary by model, control board and firmware.

How to read Panasonic heat pump error codes

Two-character diagnostic codes prefixed with a letter, shown on the indoor wall unit display or recalled with the wireless remote. H## codes indicate an abnormality (sensor, communication, or component fault); F## codes indicate a protection/system function that has tripped (refrigerant-cycle, pressure, temperature, or inverter protection). On Panasonic single- and multi-split systems the code is read by entering the self-diagnosis (CHECK) mode on the remote; the stored code is erased when main power is cut. The same H/F code family is shared across Panasonic single-split, multi-split, and the North-American Exterios / ClimaPure ductless lines.

Panasonic heat pump error codes & what they mean

These are the Panasonic heat pump codes our Greater Vancouver technicians see most. Anything marked pro repair involves electrical, refrigerant, sensor or control-board work that must be done by a licensed HVAC technician — never open the indoor/outdoor unit or refrigerant lines yourself.

Code	What it usually means	Common causes	Safe to check yourself
H11	Indoor / outdoor abnormal communication — no signal between the indoor and outdoor unit pro repair	Loose, damaged, or miswired indoor-to-outdoor communication/control wiring; Defective indoor or outdoor control board (PCB); No power reaching the outdoor unit	Confirm the outdoor unit has power (check the breaker / disconnect); Turn the system off at the breaker for one minute, then restart once
H12	Indoor-unit connection capacity/rank mismatch — total connected indoor capacity does not match the outdoor unit (multi-split) pro repair	Too many or wrong-capacity indoor units connected to the outdoor unit; Incorrect indoor/outdoor model pairing; Indoor PCB capacity-setting error	Confirm only the originally installed indoor units are connected; Restart once at the breaker
H14	Indoor intake (room) air temperature sensor abnormality — open or short circuit pro repair	Failed indoor intake-air thermistor; Loose or corroded sensor connector on the indoor board; Damaged sensor wiring	Power-cycle the unit once at the breaker; Make sure the indoor air intake/return is not blocked
H15	Outdoor compressor temperature sensor abnormality — open or short circuit pro repair	Failed compressor temperature thermistor; Loose or corroded sensor connector at the outdoor board; Damaged sensor wiring	Power-cycle the unit once at the breaker
H16	Outdoor current transformer (CT) abnormality — abnormally low / open current detected (often paired with a compressor or charge issue) pro repair	Low refrigerant charge; Outdoor power-circuit / current transformer fault; Faulty outdoor control board or power transistor module (IPM)	Power-cycle the unit once at the breaker; Confirm the outdoor unit is clear of obstruction
H17	Outdoor suction-pipe temperature sensor abnormality — open or short circuit pro repair	Failed suction-pipe thermistor; Loose or corroded sensor connector; Damaged sensor wiring	Power-cycle the unit once at the breaker
H19	Indoor fan motor mechanism locked / abnormality — the indoor fan motor is not rotating correctly pro repair	Seized or failed indoor fan motor; Object jamming the indoor fan wheel; Loose fan-motor connector or damaged wiring	Turn off the unit and confirm nothing is visibly blocking the indoor fan; Restart once after power-cycling at the breaker
H21	Indoor float switch / condensate drainage abnormality — water level protection tripped pro repair	Blocked or clogged condensate drain line; Failed condensate pump; Defective drain float switch	Check for water pooling around the indoor unit and stop use if it is leaking; Restart once after power-cycling
H23	Indoor heat-exchanger (evaporator) temperature sensor abnormality — open or short circuit pro repair	Failed indoor heat-exchanger thermistor; Loose or corroded sensor connector; Damaged sensor wiring	Power-cycle the unit once at the breaker; Clean or replace a dirty indoor air filter
H27	Outdoor air temperature sensor abnormality — open or short circuit pro repair	Failed outdoor-air thermistor; Loose or corroded sensor connector at the outdoor board; Damaged sensor wiring	Power-cycle the unit once at the breaker
H28	Outdoor heat-exchanger (condenser) temperature sensor abnormality — open or short circuit pro repair	Failed outdoor heat-exchanger thermistor; Loose or corroded sensor connector; Damaged sensor wiring	Power-cycle the unit once at the breaker; Clear leaves/debris/snow from around the outdoor coil
H30	Outdoor compressor discharge-pipe temperature sensor abnormality — open or short circuit pro repair	Failed discharge-pipe thermistor; Loose or corroded sensor connector; Damaged sensor wiring	Power-cycle the unit once at the breaker
H33	Indoor / outdoor wrong connection — incompatible unit pairing or supply-voltage/connection mismatch pro repair	Indoor and outdoor units are an incompatible match; Wrong power-supply voltage to the unit; Wiring connected to the wrong terminals	Confirm the system was not recently rewired or had a unit swapped; Restart once at the breaker
H97	Outdoor fan motor lock / abnormality — the outdoor fan motor is not rotating correctly pro repair	Seized or failed outdoor fan motor; Debris/ice jamming the outdoor fan blade; Loose fan-motor connector or damaged wiring	With the unit off, clear leaves, snow, or debris from around and inside the outdoor fan; Restart once after power-cycling at the breaker
H98	Indoor heat-exchanger high-temperature protection (heating mode) — overheating safety in heat mode DIY-checkable	Dirty/clogged indoor air filter restricting airflow; Blocked indoor supply/return airflow; Overcharged refrigerant or restricted heat exchanger	Clean or replace the indoor air filter; Make sure the indoor supply and return vents are not blocked; Restart once after cleaning
H99	Indoor heat-exchanger freeze-prevention protection (cooling mode) — anti-freeze safety activated DIY-checkable	Dirty/clogged indoor air filter restricting airflow; Blocked indoor airflow; Low refrigerant charge	Clean or replace the indoor air filter; Make sure indoor supply/return vents and the unit face are not blocked; Restart once after cleaning
F11	4-way (reversing) valve switching abnormality — heat/cool changeover failed pro repair	Stuck or defective 4-way reversing valve; Failed 4-way valve solenoid coil; Faulty indoor/outdoor heat-exchanger thermistor	Power-cycle the unit once at the breaker; Confirm the mode (heat/cool) is set correctly on the remote
F17	Indoor standby-unit freezing abnormality — a non-operating indoor unit is freezing (multi-split) pro repair	Leaking/defective outdoor expansion valve or solenoid for that circuit; Faulty indoor heat-exchanger thermistor; Refrigerant-control fault on the idle indoor unit	Power-cycle the system once at the breaker; Confirm indoor airflow is not blocked
F90	Power Factor Correction (PFC) protection — abnormal DC voltage detected at the outdoor inverter PCB pro repair	Faulty outdoor inverter / main PCB; Compressor winding imbalance causing DC voltage peak; Unstable or out-of-range supply voltage	Power-cycle the unit once at the breaker; Confirm the home supply voltage is stable (no recent brownouts)
F91	Refrigeration cycle abnormality — low-pressure / refrigerant-cycle protection pro repair	Low refrigerant charge or a refrigerant leak; Blocked/restricted refrigerant flow; Failed outdoor expansion valve	Clean or replace the indoor air filter; Clear debris/snow from around the outdoor coil; Restart once after cleaning
F93	Compressor rotation abnormality — inverter cannot drive the compressor correctly (open winding / inverter fault) pro repair	Compressor winding open or shorted; Faulty outdoor inverter / power module (IPM) board; Seized compressor	Power-cycle the unit once at the breaker
F95	Cooling high-pressure protection — high-side pressure too high in cooling mode pro repair	Dirty or blocked outdoor condenser coil; Outdoor airflow blocked (debris, wall too close, leaves/snow); Overcharged refrigerant	With the unit off, clear leaves/debris and clean around the outdoor coil; Make sure nothing is blocking outdoor airflow; Restart once after clearing
F96	Power transistor (IPM) / power-module overheating protection pro repair	Dirty outdoor heat exchanger reducing cooling of the power module; Blocked outdoor airflow; Failed outdoor fan	With the unit off, clear debris and clean around the outdoor coil and fan; Confirm the outdoor fan area is unobstructed; Restart once after clearing
F97	Compressor discharge-temperature rise protection — compressor running too hot pro repair	Low refrigerant charge or refrigerant leak; Restricted refrigerant flow / blocked coils; Failed outdoor expansion valve	Clean or replace the indoor air filter; Clear debris/snow from around the outdoor coil; Restart once after cleaning
F98	Total running-current protection — system input current exceeded the safe limit pro repair	Dirty/blocked coils or filters increasing load; Overcharged refrigerant; High ambient temperature with restricted airflow	Clean or replace the indoor air filter; Clear debris from around the outdoor unit; Restart once after cleaning
F99	Outdoor DC peak (overcurrent) detection — inverter sensed a DC current peak pro repair	Compressor winding fault or seized compressor; Faulty outdoor power transistor module (IPM); Outdoor PCB current-sensor fault	Power-cycle the unit once at the breaker; Confirm the home supply voltage is stable

Panasonic heat pump codes we get called for most

H11 — Indoor / outdoor abnormal communication — no signal between the indoor and outdoor unit

Typical causes include loose, damaged, or miswired indoor-to-outdoor communication/control wiring; defective indoor or outdoor control board (pcb); no power reaching the outdoor unit. A few things are safe to check yourself (Confirm the outdoor unit has power (check the breaker / disconnect); Turn the system off at the breaker for one minute, then restart once), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes H11 on Panasonic heat pumps throughout Greater Vancouver.

H14 — Indoor intake (room) air temperature sensor abnormality — open or short circuit

Typical causes include failed indoor intake-air thermistor; loose or corroded sensor connector on the indoor board; damaged sensor wiring. A few things are safe to check yourself (Power-cycle the unit once at the breaker; Make sure the indoor air intake/return is not blocked), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes H14 on Panasonic heat pumps throughout Greater Vancouver.

H15 — Outdoor compressor temperature sensor abnormality — open or short circuit

Typical causes include failed compressor temperature thermistor; loose or corroded sensor connector at the outdoor board; damaged sensor wiring. A few things are safe to check yourself (Power-cycle the unit once at the breaker), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes H15 on Panasonic heat pumps throughout Greater Vancouver.

F91 — Refrigeration cycle abnormality — low-pressure / refrigerant-cycle protection

Typical causes include low refrigerant charge or a refrigerant leak; blocked/restricted refrigerant flow; failed outdoor expansion valve. A few things are safe to check yourself (Clean or replace the indoor air filter; Clear debris/snow from around the outdoor coil), but the repair is a licensed HVAC technician job. HeatLand diagnoses and fixes F91 on Panasonic heat pumps throughout Greater Vancouver.

Is it safe to keep running a Panasonic heat pump with a fault code?

Most Panasonic fault codes put the heat pump into a safe lockout for a reason. You can safely check the basics — the power and breaker on, the indoor filter clean, the outdoor unit clear of snow, ice and debris, and the remote set to the correct mode and temperature — and restart it once. If the code returns, stop and book a technician. Mini-split and heat-pump faults are electrical and refrigerant issues — never open the indoor or outdoor unit, and never touch the wiring or refrigerant lines yourself.

Panasonic heat pump repair across Greater Vancouver

HeatLand has kept Metro Vancouver homes comfortable since 1999. Our licensed, insured technicians diagnose and repair Panasonic heat pumps — sensor and thermistor errors, indoor-to-outdoor communication faults, fan and compressor problems, refrigerant and pressure faults, and control-board issues — including units we didn’t install. We’re brand-agnostic, carry common parts, and give you an honest repair-or-replace assessment with upfront pricing and a free estimate. If your heat pump is beyond economical repair, we’ll show you right-sized, high-efficiency replacement options and the rebates available.

Need it sorted fast? We offer priority emergency heat pump repair. Explore Heat Pump services, browse all heat pump error codes by brand, or request a free estimate.

Panasonic heat pump service areas

We repair Panasonic heat pumps across Greater Vancouver and the Fraser Valley, including:

Panasonic heat pump error code FAQs

Can I reset my Panasonic heat pump myself?

Yes — power-cycling the unit at the breaker once is generally safe after you’ve checked the basics (the power and breaker on, the indoor filter clean, the outdoor unit clear of snow, ice and debris, and the remote set to the correct mode and temperature). If the heat pump faults again right away, stop and note the code — repeatedly resetting a heat pump that keeps locking out can mask a real problem. Call a licensed HVAC technician to diagnose it.

What does the Panasonic H11 code mean?

On Panasonic heat pumps, H11 commonly indicates indoor / outdoor abnormal communication — no signal between the indoor and outdoor unit. Confirm the exact meaning against your unit’s manual — codes can vary by model and series — and have the repair done by a licensed HVAC technician. HeatLand fixes this across Greater Vancouver.

Do you repair Panasonic heat pumps you didn’t install?

Yes. HeatLand is brand-agnostic and services Panasonic heat pumps throughout Metro Vancouver and the Fraser Valley, whether or not we installed the unit. We carry common parts and give you an honest repair-or-replace assessment.

Is a Panasonic heat pump fault code an emergency?

No heat in cold weather or no cooling in a heat wave is worth treating urgently. For priority heat pump repair across Greater Vancouver, call (604) 330-3812.

How much does Panasonic heat pump repair cost in Vancouver?

It depends on the fault. Many Panasonic codes point to sensors, thermistors, capacitors or control parts — usually far cheaper than replacement. We give upfront pricing and a free estimate before any work.

More Heat Pump error-code guides

HeatLand repairs every major heat pump brand across Greater Vancouver. More brand guides: