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Mitsubishi Error Codes & Diagnostic Codes

Updated · by Aurora Star Tech Inc.

Mitsubishi error codes and diagnostic codes: look up a code to see what it means, the likely causes and the steps to fix it.

Mitsubishi error codes by equipment type

Mitsubishi Heat Pump error codes

CodeMeaning
E0Remote controller not receiving from indoor unit
E1Remote controller memory error
E2Remote controller clock error
E3Remote controller cannot transmit
E4Indoor unit not receiving from remote controller
E5Indoor unit cannot transmit to remote controller
E6Indoor/outdoor communication - indoor not receiving
E7Indoor unit transmit error to outdoor unit
FbIndoor control board memory error
P1Room (intake) air sensor TH1 open or shorted
P2Liquid pipe sensor TH2 open or shorted
P4Drain float switch disconnected
P5Drain overflow - float switch wet with pump running
P6Coil freeze or overheat protection
P8Pipe temperature out of range (coil not cooling or heating)
P9Coil sensor TH5 open or shorted
PAWater leak detected

Find codes by Mitsubishi model

PEAD-RP35JAPEAD-RP35JALPEAD-RP50JAPEAD-RP50JALPEAD-RP60JAPEAD-RP60JALPEAD-RP71JAPEAD-RP71JALPEAD-RP100JAPEAD-RP100JALPEAD-RP125JAPEAD-RP125JALPEAD-RP140JAPEAD-RP140JAL

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

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