Goodman furnace — Goodman and Amana gas furnaces with an integrated ignition control that flashes seven for low flame signal Error Codes Directory

Goodman furnace 7 flashes: weak flame sense signal

Seven flashes on a Goodman furnace control means the flame sense current has fallen below the level the board needs to confirm a flame. The burner lights, but the control does not read enough microamps of rectified current, so it closes the gas valve and retries, then locks out after a set number of trials. Applies to: Goodman and Amana gas furnaces with an integrated ignition control that flashes seven for low flame signal This meaning applies to Goodman and Amana furnaces whose control legend lists seven flashes as a weak or low flame signal. Boards differ, so a furnace showing seven flashes for a different fault should be read against the label inside its blower door. Owner-safe checks: Watch a start-up cycle and note that the burner does light before it drops out, and count how many attempts happen before the lockout. | Confirm the furnace door is fully closed and the filter is clean, then leave the panel in place for a technician to open. Qualified technician: Cleaning or replacing the flame sense rod, checking the burner ground, measuring flame current, and adjusting gas pressure all require a qualified heating technician working inside the furnace.