Goodman Furnace Error Code 5 Flash: How to Fix It

Q: What causes Goodman furnace 5 flash error code?

The 5 flash error is caused by flame rollout from the heat exchanger, typically due to restricted airflow, cracked heat exchanger, blocked vents, dirty burners, or improper gas pressure. It's a safety mechanism to prevent dangerous conditions.

Q: Can I reset the rollout switch myself?

While you can physically reset rollout switches, you should never do so without first identifying and fixing the cause of flame rollout. Simply resetting without addressing the root problem is dangerous and violates safety protocols.

Q: Is it safe to run my furnace with a 5 flash error?

No, absolutely not. The 5 flash error indicates flame rollout, which can cause carbon monoxide poisoning, fire, or explosion. Turn off the furnace immediately and don't operate it until the problem is professionally diagnosed and repaired.

Q: How much does it cost to fix a rollout switch problem?

Costs vary widely depending on the root cause. Simple switch replacement costs $150-300, but if the heat exchanger is cracked, repairs can cost $1,500-3,000 or require furnace replacement.

Q: How can I prevent rollout switch problems?

Regular maintenance is key: change filters monthly, keep vents clear, schedule annual professional tune-ups, and ensure proper combustion air supply. These steps help maintain proper airflow and prevent conditions that cause flame rollout.

Abstract

The Goodman furnace 5 flash error code indicates an open rollout switch, which means flames are escaping from the heat exchanger where they shouldn't be. This is a critical safety issue that requires immediate attention to prevent carbon monoxide exposure and fire hazards.