Error code reference

Samsung Heat Pump Error Code E440

Compressor down by indoor unit freezing protection control - indoor heat exchanger temperature below -4°C for over 5 minutes during cooling.

SourceSamsung Heat Pump - Service Manual: Troubleshooting Guide (AVXCMH036EA)p. 12-13

Samsung codes Samsung heat pump codes

Diagnostic procedure

The full E440 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 the indoor unit where freezing was detected; remove obstacles and clean dust filter; verify indoor fan motor operation.

SourceSamsung Heat Pump - Service Manual: Troubleshooting Guide (AVXCMH036EA)p. 12-13

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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

3 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 E440 procedure

Where this code is documented

Models covered by the manuals that document this code

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