Code index · 15 entries
Goodman furnace error codes
15 codes from the Goodman furnace manual. Select a code for causes, safe checks and when to call a pro. View the source manual (PDF).
Open rollout switch.
Grounding fault / poor neutral connection.
Pressure switch circuit is closed at the start of the heating cycle.
Furnace lockout after too many ignition retries (3 total): flame failed to establish or was lost after establishment.
Pressure switch circuit is not closed.
Primary limit circuit is open.
Flame sensed with no call for heat.
Low flame signal: flame sense microamp signal is minimal.
Open fuse.
Polarity of 115 volt AC is reversed, or poor unit ground.
Gas valve is not energized when it should be.
Gas valve is energized when it should not be.
Internal faults or IRQ loss in control board.
Problem with igniter circuit.
Igniter open.