Error code reference

Samsung Heat Pump Error Code P5

System down due to frozen heat exchanger - indoor unit heat exchanger temperature kept at -4°C for more than 40 seconds.

SourceSamsung Heat Pump - Troubleshooting Guide: Outdoor Unit Error Codes (RMAH140GAM0SER)p. 181, 188

Samsung codes Samsung heat pump codes

Diagnostic procedure

The full P5 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Check indoor unit for obstacles and clean air filter; check indoor fan motor operation; check PCB fan motor output voltage.

SourceSamsung Heat Pump - Service Manual: Troubleshooting Guide (AVMBH020CA0XAG)p. 181, 188

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

9 manuals in the MyPros+ library document this code for Samsung heat pump.

Models covered by the manuals that document this code

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The full P5 procedure

Where this code is documented

Models covered by the manuals that document this code

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