Goodman Furnace Error Code 6: How to Fix It

Medium 30-60 minutes Critical Severity Verified June 2026
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Error Code
6
Brand
Goodman
Product Type
hvac
Severity
Critical
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 6 on a Goodman furnace indicates the rollout switch has opened due to a flame escape or overheating in the burner compartment. This is a serious safety issue that requires immediate attention as it can lead to fire or carbon monoxide poisoning. The furnace will shut down to prevent damage, and you must reset the switch after identifying and fixing the root cause.
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Tools You'll Need

How to Fix Error Code 6

  1. Turn Off Power and Gas

    Risk of fire or explosion. Never attempt repairs with power or gas on.

  2. Locate the Rollout Switch

  3. Check for Obstructions and Heat Damage

    Soot and heat damage indicate improper combustion. Do not operate until resolved.

  4. Reset the Rollout Switch

    If the switch trips again immediately after reset, there is a serious issue. Do not keep resetting.

  5. Test the Switch Continuity

    Ensure power is off before testing.

  6. Replace the Rollout Switch if Needed

    Use the correct amperage and temperature rating for your model.

  7. Restore Power and Gas

    Monitor the first few minutes of operation for safety.

Parts You May Need

Rollout switch (manual reset)
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Rollout switch (manual reset)
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Rollout switch (manual reset)
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Rollout switch (manual reset)
Check Price on Amazon
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When to Call a Professional

If the rollout switch trips repeatedly after reset, or if you find a cracked heat exchanger, blocked flue, or soot buildup, call an HVAC professional immediately. These issues can cause carbon monoxide poisoning or fire and require specialized tools and expertise.

Frequently Asked Questions

Can I just reset the rollout switch and keep using the furnace?
Resetting the switch without fixing the underlying issue is dangerous. The switch trips for safety reasons such as a blocked flue, cracked heat exchanger, or improper gas pressure. Repeated tripping indicates a serious problem that must be diagnosed and repaired by a professional.
What causes a rollout switch to open on a Goodman furnace?
Common causes include: restricted or blocked flue/vent pipe, cracked heat exchanger, high gas pressure, dirty burners, or a faulty rollout switch. Poor combustion air supply can also cause flame rollout.
How much does it cost to replace a rollout switch?
The part itself costs $10-$30. DIY replacement is straightforward, but if you hire an HVAC technician, expect to pay $150-$300 for service call and labor.
Is it safe to sleep with a furnace that has error code 6?
No. Error code 6 indicates a safety hazard that could lead to a fire or carbon monoxide leak. Do not leave the furnace unattended or operate it while sleeping until the problem is resolved.

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