Error code reference

Samsung Air Conditioner Error Code E404

Outdoor unit overload and compressor stop (protection control in heating mode).

SourceSamsung Multi Air Conditioner - Service Manual: Free Joint Multi Seriesp. 3-5

Samsung codes Samsung air conditioner codes

Diagnostic procedure

The full E404 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 pipe matching between indoor and outdoor units.

SourceSamsung Multi Air Conditioner - Service Manual: Free Joint Multi Seriesp. 3-5

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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 air conditioner.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full E404 procedure

Where this code is documented

Models covered by the manuals that document this code

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