"Flame not proven during trial for ignition" compresses a whole sequence: inducer runs, igniter glows, gas valve opens, and within seconds the flame sensor must report flame. Break any link and the trial fails. Goodman's chart lists the technician's suspects: gas pressure, the gas valve, the front-cover pressure switch, the flame rod.
Your part of that list is short and real: is the gas shut-off at the furnace actually open (it gets closed during other work and forgotten), is the thermostat genuinely calling, is the filter clean. One reset after those checks is fair. A second 7 means the failure is consistent, and consistent failures are what service calls are for.
Homeowner checks — the safe list:
- Thermostat set to Heat, and set a few degrees above the room temperature.
- The gas shut-off valve at the furnace: handle in line with the pipe means open. If it is off, that is your answer — and ask yourself why it was off.
- Air filter: pull it and look. A matted filter causes more furnace faults than any broken part.
- One reset is fair: power off at the switch for 30 seconds, back on, and watch what it does. If it locks out again, stop resetting it — the code is telling you something real.
7 red flashes: Lockout — excessive retries: flame was never proven during the trial for ignition
Homeowner checks
It tried to light, repeatedly, and never proved flame. Manual check list: gas pressure, gas valve, front-cover pressure switch, flame rod.
From the table: Red-LED chart — two-stage 96% furnaces — source: Goodman GCEC960803BN Installation Instructions, Troubleshooting Chart, pp. 55-56 (read the document, fetched 2026-10-30). Covers: GMEC96 / GCEC96 and their Amana twins — the current two-stage condensing furnaces with a green/amber/red LED trio on the board.
Seven versus eight
Owners mix these up, and the difference matters to the technician: 7 = never lit (flame not proven during the trial). 8 = lit, then lost it (excessive recycles — flame proven, then lost, repeatedly). If your furnace audibly lights and runs for a few seconds before quitting, that is 8's story even if you counted 7 — tell the tech what the furnace did, not just the number.
The two rules that outrank everything on this page.
1. Smell gas? Stop reading. Leave the house and call your gas utility or 911 from outside. No code is worth diagnosing through a gas smell.
2. Never bypass a safety switch — no jumping a pressure switch, no taping a limit, no propping a rollout. Those switches are the only thing between a furnace fault and a fire or carbon-monoxide problem. This library explains codes; it does not teach repairs inside the cabinet.
One honesty note before the tables: codes change between control boards, sometimes inside the same brand and the same decade. Every table below names the board and the manual it was transcribed from. The chart glued inside your own blower door is the final word for your furnace — if it disagrees with this page, believe the door.