Updated 2026-06-25
Goodman Furnace 6 flashes: What It Means & How to Fix It
Compiled & reviewed by Nikolai Tsyrenov · Updated 2026-06-25 · confidence: high
What does Goodman furnace 6 flashes mean?
Flame-rollout switch is open — a safety shutdown that can indicate blocked venting or a heat-exchanger problem. Most often caused by A flame-rollout condition, which can indicate blocked flue or restricted venting.
What Goodman furnace 6 flashes means
Flame-rollout switch is open — a safety shutdown that can indicate blocked venting or a heat-exchanger problem.
Common causes
- A flame-rollout condition, which can indicate blocked flue or restricted venting
- A cracked primary heat exchanger or plugged/restricted secondary heat exchanger
- Blocked combustion-air supply causing flames to roll out of the burner area
- A tripped manual-reset rollout limit switch
Homeowner-safe steps to try
- Turn the thermostat OFF — a rollout trip is a safety shutdown that should not be reset by the homeowner
- Do NOT press the rollout reset button or open the burner compartment
- Leave the furnace off and arrange professional service
- Be alert for any gas odor or soot near the furnace
When to call a licensed HVAC technician
If the basic checks below don't clear the code, the fault recurs, or anything involves the gas valve, burners, flame sensor or wiring, stop and book a licensed HVAC technician. Repairs to the combustion or gas system are not DIY.
⚠️ Safety first. Gas furnaces burn fuel and produce combustion gases. If you ever smell gas (a rotten-egg or sulfur odor), hear hissing, or your carbon-monoxide alarm sounds, do not touch light switches, thermostats, or the furnace — leave the home immediately and call your gas utility's emergency line or 911 from outside. Homeowners should limit themselves to simple, safe steps: setting the thermostat, checking and replacing the air filter, confirming the furnace switch and breaker are on, keeping supply registers and return grilles open, and clearing snow, ice, or debris from outdoor vent and intake terminations. Never bypass, jumper, or reset safety switches (limit, flame-rollout, or pressure switches), never open the gas valve or burner compartment, and never attempt combustion, electrical, or control-board repairs yourself. Error codes point toward a problem but are not a substitute for proper diagnosis — when in doubt, turn the system off and call a licensed HVAC technician. Keep working carbon-monoxide detectors on every level of your home.
When to call a pro: Call a licensed HVAC technician right away — a rollout trip can indicate a cracked heat exchanger or blocked venting, which are carbon-monoxide hazards and must be inspected before the furnace is used again. If you smell gas or your CO alarm sounds, leave immediately and call your gas utility or 911 from outside.
Goodman furnace 6 flashes FAQ
What does Goodman furnace 6 flashes mean?
Flame-rollout switch is open — a safety shutdown that can indicate blocked venting or a heat-exchanger problem.
What causes Goodman furnace 6 flashes?
Common causes: A flame-rollout condition, which can indicate blocked flue or restricted venting; A cracked primary heat exchanger or plugged/restricted secondary heat exchanger; Blocked combustion-air supply causing flames to roll out of the burner area; A tripped manual-reset rollout limit switch.
Can I fix Goodman furnace 6 flashes myself?
You can safely try: Turn the thermostat OFF — a rollout trip is a safety shutdown that should not be reset by the homeowner; Do NOT press the rollout reset button or open the burner compartment; Leave the furnace off and arrange professional service; Be alert for any gas odor or soot near the furnace. Call a licensed HVAC technician right away — a rollout trip can indicate a cracked heat exchanger or blocked venting, which are carbon-monoxide hazards and must be inspected before the furnace is used again. If you smell gas or your CO alarm sounds, leave immediately and call your gas utility or 911 from outside.
Other Goodman furnace codes
Goodman 1 flashLockout due to too many ignition retries (3) —Goodman 2 flashesPressure-switch circuit is stuck closed at theGoodman 3 flashesPressure-switch circuit is open (did not closeGoodman 4 flashesPrimary limit circuit (high-limit switch) is oGoodman 5 flashesFlame sensed with no call for heat — the contrGoodman 7 flashesLow flame signal — the flame-sense micro-amp sGoodman 8 flashesProblem with the igniter circuit.
Sources: hvacdirect.com · inspectapedia.com. General information for homeowners, not professional advice — confirm against your furnace's manual and a licensed technician.