A flash code is the most useful thing a Goodman tells you and the most commonly misread. Unlike the communicating brands, Goodman keeps it simple: a single LED on the control board, a number of flashes, and a legend on the access-panel door. This page is the Goodman-specific companion to our general furnace repair service and our Goodman brand overview.
How Goodman reports a fault
Goodman and Amana are predominantly a conventional, non-communicating platform, so the primary place a fault appears is the diagnostic LED on the integrated control board, read through the small sight glass on the furnace or air-handler access panel. The indoor AC control board uses the same 1–9 flash system. You count the flashes, note the pattern, and match it to the legend printed inside the access panel. Premium communicating models (paired with a compatible smart control or read by the dealer service app) can also surface faults on the thermostat or app, but on most Goodman installs the control-board LED is what you read.
Goodman / Amana LED status and flash codes
The baseline LED states first:
- Steady ON (no flashing) — normal standby, 24V present, waiting for a call.
- Steady OFF (no light) — no power to the board; check the breaker and the furnace switch.
- Slow steady flash — normal call for heat in progress.
- Rapid continuous flash — reversed line-voltage polarity or a poor ground.
The numbered fault patterns we field most, with confidence:
| Flashes | Meaning | Confidence |
|---|---|---|
| 1 flash | Ignition lockout — failed ignition retries or flame lost; ~1-hour auto-reset | High |
| 2 flashes | Pressure switch stuck closed (reads closed when it should be open) | High |
| 3 flashes | Pressure switch open — inadequate draft (clogged trap, blocked vent, weak inducer) | High |
| 4 flashes | Open high-limit switch — overheat from restricted airflow (filter, registers, blower) | High |
| 5 flashes | Usually indicates flame sensed with no call for heat (a leaking or slow-closing gas valve) | Medium |
| 7 flashes | Low flame signal — dirty/mispositioned flame sensor or low gas pressure | High |
| 8 flashes | Usually indicates an ignitor (hot-surface igniter) fault | Medium |
Why we cut a "6-flash" entry: across Goodman control-board revisions, six flashes means a flame-rollout condition on some boards and reversed AC polarity on others — the sources genuinely conflict, so we do not publish a single meaning for it. More broadly, the exact map can shift by board revision, which is why the legend printed inside your access panel is the authoritative key and why we confirm every code on the meter rather than condemning a part on the flash count alone.
The 1-flash ignition lockout
The most common Goodman code we field is the 1-flash ignition lockout. The furnace attempted ignition a set number of times (usually three), could not prove a stable flame, and locked out for safety — it typically auto-resets after about an hour. The underlying cause is almost always a worn hot-surface ignitor, a fouled flame sensor, low gas pressure, or a draft fault. Repeatedly cutting power to clear it just restarts the same failed sequence. The full no-heat chain is on our Goodman furnace not heating page and in our furnace ignitor failure guide.
Pressure and limit faults — the airflow story
The 2-, 3-, and 4-flash codes all trace back to airflow and venting, which is the most common chain we see on the first cold night. A 3-flash (pressure switch open) usually means a clogged condensate trap, a blocked or sagging vent, or a weak inducer keeping the furnace from proving safe draft. A 4-flash (open high-limit) means the furnace overheated — almost always restricted airflow from a clogged filter, closed registers, or a dirty blower. Both are walked through in our furnace short-cycling and furnace blowing cold air guides. We meter the switch, the inducer, and the airflow before quoting a part.
Reading the code is the start, not the fix
Here is the honest part. A flash code names a subsystem, not a failed part. A 3-flash can be a $0 clogged-trap clean or a $580–$1,100 inducer; a 4-flash can be a filter you change yourself or a heat-exchanger problem you should not ignore; a 7-flash can be a $185–$295 flame-sensor clean or a gas-pressure problem. We read the code on arrival, then confirm it on the meter — flame-sense microamps, draft pressure at the inducer, limit continuity, gas pressure — and only then name the part. We do not guess from the flash count alone, and we do not jumper a safety to force a furnace to run. The flat $89 diagnostic ($149 after-hours) credits to the repair, so the read-and-confirm step costs you nothing if you proceed.
Goodman diagnostic pricing
Reading and confirming the code is the $89 diagnostic ($149 after-hours), credited to the repair. The repair price follows the cause, flat-rate from our SoCal tickets: flame sensor $185–$295, hot-surface ignitor $245–$485, gas valve $385–$685, integrated control board $480–$950, draft inducer $580–$1,100. A cracked heat exchanger ($1,500–$3,500) is the one fault where we quote replacement against repair and red-tag the furnace if it is leaking. Goodman parts are inexpensive and usually same-day. Full furnace table on our Goodman furnace repair page; cooling-side faults are on Goodman AC not cooling.
Amana and Goodman
Amana and Goodman share the same control platform — the diagnostic LED flashes the same patterns and uses the same access-panel legend, and the parts cross-reference directly. We diagnose them identically. For the cooling side of a Goodman system, see Goodman AC repair, and the full lineup on our Goodman brand page.