Carrier furnace code 22: Abnormal Flame-Proving Signal
Safety issue — act now
What does code 22 mean on a Carrier furnace? Flame is proved while the gas valve is de-energized; the inducer runs until the fault clears. Official causes: a leaky or stuck-open gas valve.
This condition involves the gas or combustion side. If you smell gas or a CO alarm sounds: leave, then call your gas utility. Diagnostic info here is reference — combustion repairs are for licensed technicians. All six emergency signs →
Gas off at the appliance valve, same-day licensed tech. Not a DIY code. DIY part cost: $90–200 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Leaky / stuck-open gas valve TECH
Parts referenced by this code
Always match parts against your model's parts list — part numbers vary within a series.
Questions about this code
What does code 22 mean on a Carrier furnace?
Flame is proved while the gas valve is de-energized; the inducer runs until the fault clears. Official causes: a leaky or stuck-open gas valve.
How do I fix Carrier furnace code 22?
Stop troubleshooting. If you smell gas, leave without using switches and call the gas utility or 911 from outside. Otherwise set the thermostat to off and get same-day licensed service.
How much does it cost to fix Carrier furnace code 22?
This code doesn't predict a price. Gas-valve diagnosis and repair need a licensed technician, so arrange service promptly.
Applies to
58STA · 58STX
Different Carrier generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Same control platform, same code: Bryant furnace code 22 · Payne furnace code 22
Verified against Carrier 58STA/58STX Installation & Service Instructions (1106202L), p.37/48
Last verified 2026-07-06 · page updated 2026-10-03 · how we verify
Related Carrier furnace codes
These codes use the same status led — short + long flash codes system.