Updated 2026-06-25
Goodman Furnace 8 flashes: What It Means & How to Fix It
Compiled & reviewed by the HVAC Flash Codes editorial team · Updated 2026-06-25 · confidence: high
⚠️ Try the safe checks, then a pro
What does Goodman furnace 8 flashes mean?
Problem with the igniter circuit. Most often caused by A failed, cracked, or improperly connected/shorted hot-surface igniter.
What your furnace LED does. The diagnostic light blinks 8 flashes, pause, repeat — that pattern is Goodman furnace 8 flashes.
What Goodman furnace 8 flashes means
Problem with the igniter circuit.
Common causes
- A failed, cracked, or improperly connected/shorted hot-surface igniter
- Poor unit ground
- An igniter relay fault on the integrated control module
- Wiring problem between the control module and igniter
Homeowner-safe steps to try
- Cycle power at the furnace switch once to allow a retry
- Confirm the breaker is on and the furnace door panel is closed
- Do NOT open the burner compartment or handle the igniter — it is fragile and is a combustion component
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 — igniter and igniter-circuit faults require professional diagnosis and replacement parts.
Goodman furnace 8 flashes FAQ
What does Goodman furnace 8 flashes mean?
Problem with the igniter circuit.
What causes Goodman furnace 8 flashes?
Common causes: A failed, cracked, or improperly connected/shorted hot-surface igniter; Poor unit ground; An igniter relay fault on the integrated control module; Wiring problem between the control module and igniter.
Can I fix Goodman furnace 8 flashes myself?
You can safely try: Cycle power at the furnace switch once to allow a retry; Confirm the breaker is on and the furnace door panel is closed; Do NOT open the burner compartment or handle the igniter — it is fragile and is a combustion component. Call a licensed HVAC technician — igniter and igniter-circuit faults require professional diagnosis and replacement parts.
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 6 flashesFlame-rollout switch is open — a safety shutdoGoodman 7 flashesLow flame signal — the flame-sense micro-amp s
Sources: hvacdirect.com · inspectapedia.com. General information for homeowners, not professional advice — confirm against your furnace's manual and a licensed technician.