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Error code reference
Goodman Heat Pump Error Code Ec
Heater kit too large, too small, or no match - dip switches on control board need to be configured for installed electric heater kit.
SourceGoodman Heat Pump - Full Service Manual: GSX/GSZ Series R-410Ap. 120
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
Configure dip switches in accordance with Electric Heating Airflow Table. Reset power to the unit.
SourceGoodman Heat Pump - Full Service Manual: GSX/GSZ Series R-410Ap. 120
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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