Goodman GMSS960803BN Error Code 8 Flashes: Igniter Circuit Fault
What Does Code 8 Flashes Mean?
Eight flashes on the GMSS960803BN's Integrated Control Module indicate a problem in the igniter circuit. Before it will run the ignition sequence, the board checks that it can properly energize the hot surface igniter; if it cannot, it flags this fault and the furnace never attempts to light.
Hot surface igniters are wear items that degrade with every heating cycle. The brittle silicon carbide or silicon nitride element develops micro-cracks over years of heating and cooling until the element finally fractures and opens the circuit, at which point the board can no longer pass current through it and logs the fault. Goodman also attributes this code to an improperly connected igniter, a poor unit or burner ground, or a faulty control module.
This fault sits at the very start of the ignition chain, which ties it to neighboring codes. Where the 1-flash lockout is the furnace giving up after three attempts to light and hold a flame, the 8-flash igniter fault means the board cannot even begin — the igniter never energizes, so no ignition attempt happens. Because grounding, wiring, and igniter replacement all require testing and disassembly around the burner assembly, this is professional work rather than a homeowner repair.
What You'll Notice
- The furnace does not attempt to ignite at all on a call for heat
- The hot surface igniter never glows during what should be the startup sequence
- The diagnostic LED blinks eight times, pauses, and repeats
- No inducer-to-ignition progression — the sequence stalls before the burners
- If the igniter was just replaced, the connector may not be fully seated
Common Causes
How This Is Diagnosed
A technician confirms the igniter is failing to energize, then measures the igniter element's resistance to see whether it has gone open — a burned-out igniter is the most common finding. If the igniter tests good, they check the wiring and connector between the control module and the igniter for a loose or corroded connection, and verify the unit and burner ground, since a poor ground can mimic an igniter-circuit fault. If everything downstream checks out, the control module itself is suspected. All of these checks involve electrical testing around the burners, so they are done by a professional.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- The furnace shows eight flashes and never attempts ignition
- The igniter does not glow at all during startup
- A newly installed igniter still throws the 8-flash code (check the connector seating)
- You suspect a poor ground at the furnace chassis or burner assembly
Frequently Asked Questions
How long does the igniter on a Goodman GMSS960803BN last?
Hot surface igniters are wear parts and their life varies with how often the furnace cycles and local conditions, commonly lasting several years before the element cracks. When it fails open, the board flags the 8-flash igniter-circuit fault.
Is the 8-flash code always a bad igniter?
Not always. A failed igniter is the most common cause, but a loose or corroded igniter connector, a poor unit or burner ground, or a faulty control module can produce the same code. A technician tests to confirm which before replacing parts.
How is 8 flashes different from a 1-flash lockout?
Eight flashes means the igniter circuit is faulted so the furnace never even begins to light. A 1-flash lockout happens after the furnace makes three real ignition attempts and fails to establish or hold a flame.
Can I replace the igniter myself?
This furnace lists the igniter-circuit fault as professional service. Igniter elements are fragile, must be matched to the model, and the surrounding grounds and wiring need verification, so a technician should handle the replacement.
✓ Verified against manufacturer service manual — March 2026