What It Means
Short circuit detected in low-voltage control wiring.
Goodman All Systems
Goodman Error Code E5
Troubleshooting guide for the Goodman system fault E5.
Possible Causes
- Short circuit in low-voltage control wiring.
- Damaged low-voltage wire harness or thermostat wiring.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis
Short in low voltage wiring.
All Recorded Causes
Verify Before Replacing Parts
- Confirm the exact Goodman model family and default context before acting on a generic code description.
- Start with line voltage, low voltage, and board output checks in sequence so the fault is isolated cleanly — the data plate flags the most likely cause listed above.
- Inspect connectors, relay outputs, and any recently replaced electrical parts for mismatch or loose fit, and verify the next candidate on the list.
- After the correction, run the system long enough to confirm the default fault does not return under normal load.
Not sure which system this Goodman code is on?
ACLogics has guided diagnostics for 20 Goodman fault codes and asks the right questions to narrow it down.
