Payne PG96VTA Error Code 22: Abnormal Flame-Proving Signal
What Does Code 22 Mean?
Status code 22 on the Payne PG96VTA is an abnormal flame-proving signal fault. The integrated furnace control has detected that the flame sensor is proving a flame while the gas valve is de-energized and should be closed. When this fault is active, the inducer motor continues running to ventilate the heat exchanger until the fault is cleared.
The service documentation identifies two causes: a leaky gas valve that allows a small flow of gas to pass through and sustain a residual flame even when the valve signal is off, and a gas valve stuck in the open position. A leaky valve is a mechanical wear issue where the valve seat does not seal completely when closed. A stuck-open valve means the valve's internal actuator has failed and cannot close when commanded.
Because this fault indicates gas is flowing when it should not be, it is a safety-relevant condition. Do not continue operating the furnace until the gas valve has been inspected and replaced if faulty. A licensed HVAC technician must diagnose whether the flame signal is a genuine leak or a false reading from the flame sensing circuit.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Leaky gas valve allowing gas to flow when it should be closed | Most common | ✗ Call a pro → |
| Gas valve stuck in the open position | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- Contact a technician immediately — a leaky or stuck-open gas valve is a safety hazard that must be inspected before operating the furnace
- Do not attempt to operate the furnace until code 22 is diagnosed and resolved
✓ Verified against manufacturer service manual — March 2026