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Carrier 22: Abnormal flame-proving signal: flame is proved while the gas valve is de-energized. Inducer runs until the fault is cleared

Ref. CARRIER-22 · From the Carrier furnace manual · Updated 2026-10-23

Status code22Carrier
What it means

Abnormal flame-proving signal: flame is proved while the gas valve is de-energized. Inducer runs until the fault is cleared.

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How it shows: Status LED: 2 short flash(es) then 2 long flash(es) (code 22)

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§1Likely causes

  • Leaky gas valve
  • Stuck-open gas valve

§2Safe DIY steps

  1. Technicianinspect and replace the gas valve as needed
Safety firstIf you smell gas, do not touch any electrical switch or use a phone in the building; leave immediately and call your gas supplier from outside. Turn off electrical power at the furnace switch or breaker before opening any panel, and never bypass or jumper a limit, rollout or pressure switch. Gas valve, burner, venting, wiring and control-board work should be done by a licensed HVAC technician.

§3When to call a pro

Call a licensed HVAC technician: immediately; this is a gas valve safety fault.

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§4Other Carrier codes

13Carrier

Limit circuit lockout: a limit or flame rollout switch was open longer than 3 minutes. Control auto-resets after 3 hours (see code 33).

14Carrier

Ignition lockout: system failed to ignite gas and prove flame in 4 attempts. Control auto-resets after 3 hours (see code 34).

21Carrier

Gas heating lockout. Control will NOT auto-reset.

23Carrier

Pressure switch did not open.

31Carrier

Low (LPS) or high (HPS) pressure switch did not close or reopened.

24Carrier

Secondary voltage (24 V) fuse is open.