Mitsubishi Electric Heat Pump Error Codes
Complete list of Mitsubishi Electric heat pump error codes with causes and how to fix them.
E0
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Mitsubishi Electric Heat Pump error code E0: Remote control transmission error.
Technician Required
E1
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Mitsubishi Electric Heat Pump error code E1: Indoor/outdoor units communication …
Technician Required
E2
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Mitsubishi Electric Heat Pump error code E2: No return signal from outdoor unit.
Technician Required
E3
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Mitsubishi Electric Heat Pump error code E3: No return signal from indoor unit.
Technician Required
E4
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Mitsubishi Electric Heat Pump error code E4: Transmission error (indoor to …
Technician Required
E5
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Mitsubishi Electric Heat Pump error code E5: Transmission error (master to slave …
Technician Required
E6
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Mitsubishi Electric Heat Pump error code E6: Communication error between units …
Technician Required
E7
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Mitsubishi Electric Heat Pump error code E7: Communication error (indoor to …
Technician Required
E8
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Mitsubishi Electric Heat Pump error code E8: Communication error (outdoor to …
Technician Required
E9
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Mitsubishi Electric Heat Pump error code E9: Communication error (outdoor to …
Technician Required
EB
🟡
Mitsubishi Electric Heat Pump error code Eb: Communication error (BC controller …
Technician Required
F1
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Mitsubishi Electric Heat Pump error code F1: Indoor coil temperature sensor …
✓ DIY Possible
F2
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Mitsubishi Electric Heat Pump error code F2: Indoor intake air temperature …
✓ DIY Possible
F3
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Mitsubishi Electric Heat Pump error code F3: Outdoor temperature sensor failure.
✓ DIY Possible
F4
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Mitsubishi Electric Heat Pump error code F4: Outdoor liquid temperature sensor …
✓ DIY Possible
F5
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Mitsubishi Electric Heat Pump error code F5: Outdoor discharge temperature …
✓ DIY Possible
F6
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Mitsubishi Electric Heat Pump error code F6: Outdoor suction temperature sensor …
✓ DIY Possible
P1
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Mitsubishi Electric Heat Pump error code P1: Indoor overcurrent protection.
✓ DIY Possible
P2
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Mitsubishi Electric Heat Pump error code P2: Outdoor overcurrent protection.
✓ DIY Possible
P4
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Mitsubishi Electric Heat Pump error code P4: Drain pump fault or float switch …
✓ DIY Possible
P5
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Mitsubishi Electric Heat Pump error code P5: Drain pump fault.
✓ DIY Possible
P6
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Mitsubishi Electric Heat Pump error code P6: Freeze protection activated.
✓ DIY Possible
P8
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Mitsubishi Electric Heat Pump error code P8: Outdoor unit malfunction.
✓ DIY Possible
P9
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Mitsubishi Electric Heat Pump error code P9: Indoor fan motor abnormal.
✓ DIY Possible
PA
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Mitsubishi Electric Heat Pump error code PA: Outdoor fan motor abnormal.
✓ DIY Possible
PB
🔴
Mitsubishi Electric Heat Pump error code Pb: Outdoor unit protection (high …
Technician Required
U1
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Mitsubishi Electric Heat Pump error code U1: Reverse phase / open phase …
✓ DIY Possible
U2
🔴
Mitsubishi Electric Heat Pump error code U2: Abnormal high pressure.
Technician Required
U3
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Mitsubishi Electric Heat Pump error code U3: Discharge temperature abnormally …
✓ DIY Possible
U4
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Mitsubishi Electric Heat Pump error code U4: Overcurrent protection (outdoor).
✓ DIY Possible
U6
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Mitsubishi Electric Heat Pump error code U6: Compressor overcurrent during …
Technician Required
U7
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Mitsubishi Electric Heat Pump error code U7: Transmission error between inverter …
Technician Required
U8
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Mitsubishi Electric Heat Pump error code U8: Transmission error between inverter …
Technician Required
UA
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Mitsubishi Electric Heat Pump error code UA: Incorrect combination of indoor and …
✓ DIY Possible