What It Means
System protection fault due to low refrigerant, airflow loss, or liquid line restriction.
Goodman All Systems
Goodman Error Code 01
Troubleshooting guide for the Goodman system fault 01.
Possible Causes
- Low refrigerant charge.
- Restriction in liquid line.
- Indoor blower motor failure.
- Indoor thermostat set extremely low.
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
Low refrigerant charge./Restriction in liquid line./Indoor blower motor failure.Indoor thermostat set extremely low.
All Recorded Causes
Verify Before Replacing Parts
- Confirm the exact Goodman model family and default context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since the most likely cause listed above.
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm 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.
