Error code reference

GE Washer Error Code 78

Board Communication API Mismatch - The Main Board detects that it doesn't have the same API version as another board.

SourceGE Appliances Top Load Washer - Service Manual (27-in.)p. 64

Diagnostic procedure

The full 78 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

Use SmartHQ Service diagnostic tool or use a SUM module to update the software.

SourceGE Appliances Top Load Washer - Service Manual (27-in.)p. 64

Unlock with pass

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 GE washer.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full 78 procedure

Where this code is documented

Models covered by the manuals that document this code

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