HIGH URGENCY

Goodman 5 Flashes — Flame Sensed With Gas Valve Off

5 flashes

Flame detected when gas valve closed — leaky valve.

Brand: Goodman (Also covers Amana, Daikin) | Equipment: Gas Furnace

What This Code Means

5 flashes means the flame sensor detects flame even when the gas valve is supposed to be closed. Usually a leaky gas valve.

Most common

What: Valve doesn't fully close.

How to check: Tech valve test.

Fix: Replace gas valve.

Shop parts

Less common

What: Board misreads flame signal.

How to check: Tech tests flame sensor signal.

Fix: Replace board.

Shop parts

Is Goodman 5 flashes dangerous?

Yes — uncontrolled flame. Shut off gas immediately.

DIY?

No — gas valve work is professional.

Same on Amana/Daikin?

Yes.