Troubleshooting steps
Check sensor connections, test sensor resistance
HVAC Error Codes
Goodman F18 Error
Indoor temperature sensor fault
Details
Goodman F18 error indicates indoor temperature sensor fault. Sensor disconnected, wiring fault. Check sensor connections, test sensor resistance.
Error typefault
MeaningIndoor temperature sensor fault
Typical causesSensor disconnected, wiring fault
SolutionsCheck sensor connections, test sensor resistance
Severitymedium
Catalog references
Where this appears
GoodmanF18
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FAQ
Common questions
What causes F18 error?
Sensor disconnected, wiring fault
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