Carrier Furnace Error Code 22 Flash: How to Fix It

Q: What does Carrier furnace error code 22 flash mean?

Error code 22 flash indicates an abnormal flame proving signal, typically caused by reverse polarity wiring or a grounded burner component. This prevents the furnace from safely detecting flames during operation.

Q: Is it safe to reset Carrier error code 22 flash?

No, you should not simply reset this error code. It indicates a serious safety issue with flame detection that must be properly diagnosed and repaired before the furnace can operate safely.

Q: Can I fix Carrier furnace error 22 flash myself?

While some aspects like cleaning the flame sensor can be DIY, this error often requires electrical troubleshooting skills and gas appliance knowledge. If you're not experienced with furnace repair, it's safer to call a professional.

Q: How much does it cost to fix Carrier error code 22 flash?

Repair costs typically range from $150-400 depending on whether you need a new flame sensor ($50-100), wiring repair ($100-200), or control board replacement ($200-400). Professional service calls add $100-150.

Q: What causes reverse polarity in Carrier furnace flame sensors?

Reverse polarity typically occurs from incorrect wiring during installation or repair, damaged control boards, or amateur electrical work. It can also happen if wires are accidentally switched during maintenance.

Abstract

Carrier furnace error code 22 flash indicates an abnormal flame proving signal, which means there's either reverse polarity in the wiring or a grounded burner component. This is a serious safety issue that prevents your furnace from operating properly and requires immediate attention.