Home Fault Codes

Carrier Furnace Error Code 22: Meaning and Fix

Applies to: Carrier 58STA and 58STX single-stage induced-combustion furnaces with a two-digit status code LED.

22
How 22 appears on a Carrier furnace display.

Also shown as: 2 short 2 long, 2 short, 2 long flashes

Reading the furnace display

A furnace reports faults on a small status LED on the control board, seen through the sight glass in the blower door, or on a two-digit display. Watch a full cycle of the pattern and count the flashes, including the pause between groups, before you decide what you saw. The code chart is on the label inside the blower door.

This page lists the fault codes this brand documents, with likely causes and a short repair path. The codes apply to model numbers such as 58STA and 58STX; check the label on your unit to confirm yours.

What causes 22

How to fix it

If you smell gas, leave the building and call your gas utility from outside; do not touch switches or the furnace. Switch the furnace power off before you open the blower door or touch the igniter or flame sensor, and call a licensed HVAC technician if you are not sure.

The code meaning comes from the manufacturer document listed under Sources. The causes and steps below are general troubleshooting guidance, not the manufacturer's service procedure.

  1. If you smell gas or see flame while the thermostat is not calling for heat, switch off the furnace and the gas supply and leave the building. Call your gas utility from outside.
  2. Do not run the furnace with a suspect gas valve.
  3. Have a licensed technician test the gas valve and flame sense circuit.
  4. Do not attempt to repair or replace a gas valve yourself.
  5. Restore power and run a heating cycle. If the code returns, call a licensed HVAC technician and give them the code, the board label and the furnace model number.

Questions

What does 22 mean on a Carrier furnace?

Code 22 (2 short, 2 long flashes) on a Carrier furnace means the control sees flame while the gas valve should be closed. The inducer keeps running until the condition clears.

Can I reset the furnace myself?

The control can be reset by switching power off at the furnace switch or breaker for about 30 seconds, which clears some lockouts. If the same code returns, the fault is still present and the control will shut the furnace down again. Never bypass a safety switch to keep it running.

Is code 22 dangerous?

It can be. It points to flame being detected when the valve should be shut, which can mean a leaking or stuck gas valve. Treat any gas smell as an emergency: leave the building and call the gas utility. Otherwise, switch the furnace off and call a licensed technician.

Other brands with code 22

The same code can mean something different on another maker's appliance. Check the brand before you act.

Bryant furnaceAbnormal flame-proving signal (flame sensed with gas valve off)Chamberlain garage door openerLogic board fault 2-2Craftsman garage door openerLogic board fault 2-2LiftMaster garage door openerLogic board fault 2-2Payne furnaceAbnormal flame-proving signal (flame sensed with gas valve off)

Other Carrier furnace codes

Continuous OffNo power to the control board (LED stays dark)Continuous OnNormal: control board has 24 volt power (LED steady on)Rapid FlashingLine voltage polarity reversed (LED flashing rapidly)11No previous fault code stored12Blower on after power up13Limit circuit lockout

Sources

Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.

Applies to models including 58STA, 58STX.