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Error code reference

GE Heat Pump Error Code EC

Communication error between outdoor and indoor unit detected during wiring error check mode.

GE codesGE heat pump codes
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Diagnostic procedure

The full EC 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
1
First diagnostic step
Correct wiring connections and re-run wiring error check test.
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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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