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Electrical fault: gas furnace codes by brand
A short circuit, earth fault or failed switch was detected in the unit's wiring or components.
| Brand | Code | Meaning | What you can do |
|---|---|---|---|
| Carrier | 24 | 24-volt fuse on the control has blown | Call a pro |
| Carrier | 10.1 | Line voltage polarity reversed | Call a pro |
| Carrier | 24.1 | Fuse fault, short in the 24-volt wiring | Call a pro |
| Goodman | E10 | Grounding fault or poor neutral connection | Call a pro |
| Goodman | EA | Reversed polarity or poor ground | Call a pro |
| Goodman | EEA | Reversed polarity or poor ground | Call a pro |
| Carrier | amber light flashing rapidly | Line voltage polarity reversed or the furnace is not grounded | Call a pro |
| Goodman | 9 red flashes | Configuration error or electrical fault (depends on model) | Call a pro |
| Goodman | red light flashing rapidly | Electrical fault or configuration error (depends on model) | Call a pro |