Error code reference

Samsung Air Conditioner Error Code E439

Refrigerant leakage error - both high and low pressure sensors values out of range simultaneously.

SourceSamsung System Air Conditioner Indoor Unit - Full Service Manual (AM FN Series)p. 4-31, 4-91

Samsung codes Samsung air conditioner codes

Diagnostic procedure

The full E439 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 high/low pressure connector is disconnected from PCB; check 5V between pins 3 and 4; check refrigerant with manifold gauge.

SourceSamsung System Air Conditioner Indoor Unit - Full Service Manual (AM FN Series)p. 4-31, 4-91

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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 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 E439 procedure

Where this code is documented

Models covered by the manuals that document this code

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