Error code reference

Samsung Air Conditioner Error Code E603

Communication error between 7 day scheduler and wired remote controller.

SourceSamsung Air Conditioner - Service Manual: Troubleshooting (AVMKH020CA1)p. 222

Samsung codes Samsung air conditioner codes

Diagnostic procedure

The full E603 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 wired remote controller installation wiring.

SourceSamsung DH105EAV Air Conditioner - Service Manual: Troubleshootingp. 4-3

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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

4 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 E603 procedure

Where this code is documented

Models covered by the manuals that document this code

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