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Every common Mitsubishi Electric fault code with what it means, the likely cause, and how CANRO Heating & Cooling fixes it — servicing Mitsubishi Electric ductless mini-splits and cold-climate heat pumps across Greater Vancouver since 1999. Licensed Technical Safety BC contractor (gas LGA0043870 · boiler LBP0046450).
Mitsubishi Electric ductless systems blink the indoor OPERATION LED when a fault is stored and show a P / E / U code on the remote or in test mode.
Important: One power-cycle reset is generally safe for a transient fault. If the same code returns within minutes, stop resetting — lockouts exist to protect the heat exchanger, ignition system and gas-valve safety circuit. Note the exact code and call CANRO at (604) 359-1081. We carry common Mitsubishi Electric parts on every truck, so most code-triggered faults are fixed in one visit. Smell gas? Leave and call the gas utility emergency line first.
What it means: Indoor intake air thermistor fault.
Common causes: Failed/disconnected thermistor.
What to do: Service.
Reset guidance: no
What it means: Indoor coil (liquid / 2-phase) pipe thermistor fault.
Common causes: Failed/disconnected sensor.
What to do: Service.
Reset guidance: no
What it means: Drain float/sensor fault.
Common causes: Sensor or wiring.
What to do: Service.
Reset guidance: no
What it means: Condensate not draining — overflow protection tripped.
Common causes: Clogged drain, failed pump, slope.
What to do: Clear drain; service pump.
Reset guidance: no
What it means: Coil icing (cooling) or overheat (heating) protection.
Common causes: Low refrigerant, dirty filter/coil, low airflow, fan fault.
What to do: Clean filter; if it returns, call — possible low charge.
Reset guidance: no
What it means: Outdoor/indoor pipe temperature out of range.
Common causes: Refrigerant charge, sensor, restricted flow.
What to do: Service.
Reset guidance: no
What it means: Signal-transmission fault between remote and indoor unit.
Common causes: Remote, wiring, board.
What to do: Service.
Reset guidance: no
What it means: Communication error between indoor and outdoor units.
Common causes: Interconnect wiring, board, voltage.
What to do: Service — common after wiring/power issues.
Reset guidance: no
What it means: Abnormal high discharge temp or DC bus voltage.
Common causes: Low refrigerant, overload, voltage.
What to do: Call — protects the compressor.
Reset guidance: no
What it means: Power-module/compressor overcurrent trip.
Common causes: Compressor, inverter board, charge.
What to do: Specialized service.
Reset guidance: no
What it means: Outdoor current-protection trip.
Common causes: Inverter, compressor, charge, voltage.
What to do: Specialized service.
Reset guidance: no
What it means: The indoor LED blinks when a fault is stored — read the code on the remote/test mode.
Common causes: Any of the above.
What to do: Note the code and call.
Reset guidance: no
CANRO offers same-day and after-hours emergency repair across Greater Vancouver — no-heat, no-cooling and no-hot-water calls are prioritized. Note your code and call now.
📞 Call (604) 359-1081 — emergency Mitsubishi Electric repairOur licensed Red Seal technicians diagnose and repair Mitsubishi Electric ductless mini-splits and cold-climate heat pumps in every Metro Vancouver city — Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North & West Vancouver, New Westminster, Delta, Langley, Port Moody, Port Coquitlam, White Rock, Pitt Meadows and Maple Ridge — with honest, up-front pricing and a 4.9-star rating from 85+ Google reviews.
This Mitsubishi Electric error-code guide is maintained by the CANRO Heating & Cooling team from 25+ years of HVAC install, service and repair across Greater Vancouver. Flash-count and code behaviour described match current Mitsubishi Electric model manuals; exact codes can vary by model and series, so confirm against your unit’s manual or tell us the code when you call. Last reviewed June 2026.
Each Mitsubishi Electric code points to a specific fault — ignition, pressure/draft, high-limit, flame-sensing, blower or communication. The guide above lists each one with its cause and fix. Tell us the exact code when you call (604) 359-1081 and we usually know the likely cause before arriving.
One power-cycle reset is fine for a one-off fault. If the same code returns within minutes, stop — repeated resets stress the ignition, gas-valve and heat-exchanger safety circuits. Note the code and call.
Yes — CANRO offers same-day and after-hours emergency response across Greater Vancouver, and we carry common Mitsubishi Electric parts so most code faults are fixed in one visit. Call (604) 359-1081.
Yes — Technical Safety BC gas contractor LGA0043870 and boiler licence LBP0046450, Red Seal technicians, fully insured, serving Greater Vancouver since 1999.
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25+ years keeping Metro Vancouver homes comfortable. Honest advice, upfront pricing, work that lasts.