Error code reference

Samsung Air Conditioner Error Code E4

Indoor unit float switch error - float switch open for longer than 1 minute due to drain pump failure or detection sensor bad.

SourceSamsung AVMKH032CA1 - Service Manual: Troubleshooting & Diagnosticsp. 182, 201

Samsung codes Samsung air conditioner codes

Diagnostic procedure

The full E4 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 if indoor unit is cassette type; measure float switch connector resistance for open state.

SourceSamsung AVMKH032CA1 - Service Manual: Troubleshooting & Diagnosticsp. 182, 201

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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

7 manuals in the MyPros+ library document this code for Samsung air conditioner.

Models covered by the manuals that document this code

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The full E4 procedure

Where this code is documented

Models covered by the manuals that document this code

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