HIGH URGENCY

Rheem Code 14 - Unexpected Flame

Code 14

Flame detected when gas valve should be off - leaky valve.

Brand: Rheem (Also covers Ruud) | Equipment: Gas Furnace

What This Code Means

Code 14 on a Rheem (Ruud) furnace means flame was detected even when the gas valve should have been closed. Indicates a serious gas valve problem - safety hazard.

Likely Causes (Ranked)

Most common

Leaky gas valve

What: Valve doesn't fully close, fuel keeps flowing.

How to check: Tech valve test.

Fix: Replace gas valve.

Shop parts

Less common

Faulty control board

What: Board misreads flame signal.

How to check: Tech diagnostic.

Fix: Replace board.

Shop parts

Diagnostic Steps

Shut off gas at furnace shutoff
Cut power
Call licensed HVAC tech immediately

Frequently Asked Questions

Is Rheem code 14 dangerous?

Yes. Uncontrolled gas/flame is a fire and carbon monoxide risk. Shut off gas at the furnace shutoff valve and call a tech.

Can I fix this myself?

No - gas valve replacement requires a licensed HVAC technician with manometer.

Same on Ruud?

Yes.

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Need More Help?

Try our interactive symptom diagnostic tool or browse Rheem parts.

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