Error code reference

Samsung Heat Pump Error Code E304

CT over-current error - CT sensor value of relevant compressor maintained over 20A for more than 5 seconds.

SourceSamsung Heat Pump - Service Manual: Troubleshooting (AVXWHH071EA)p. 11-10, 11-21

Diagnostic procedure

The full E304 procedure

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MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Check CT sensor connector resistance; verify CT value is 0 when compressor is stopped.

SourceSamsung Heat Pump - Service Manual: Troubleshooting (AVXWHH071EA)p. 11-10, 11-21

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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

6 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 E304 procedure

Where this code is documented

Models covered by the manuals that document this code

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