Quick answer: Goodman furnaces flash a red LED to report faults. On the most common control boards, 1 flash is an ignition lockout, 2 flashes is a pressure switch stuck closed, 3 flashes is a pressure switch that will not close, 4 flashes is an open high limit, 5 flashes is flame sensed with no call for heat, and 6 flashes is an open rollout switch or similar fault, depending on the board. Rapid flashing usually means reversed polarity. Amana and Daikin furnaces are made by the same company and use similar codes.
Safety first: if you smell gas, do not reset or relight anything. Leave the home and call your gas utility (Nicor Gas 1-888-642-6748, or North Shore Gas 1-866-556-6005) or 911 from outside.
Goodman Flash Code Chart
| Flashes | Typical meaning | Common causes |
|---|---|---|
| Steady on or slow blink | Normal operation | No fault |
| Off | No power or failed control | Switch off, tripped breaker, blown fuse, open door switch, failed board |
| 1 flash | Ignition lockout; flame not detected or sustained | Dirty flame sensor, bad igniter, gas supply |
| 2 flashes | Pressure switch stuck closed | Failed switch, blocked hose port |
| 3 flashes | Pressure switch will not close | Blocked vents, condensate trap, cracked hose, weak inducer |
| 4 flashes | Open high limit | Dirty filter, closed vents, blower problem |
| 5 flashes | Flame sensed with no call for heat | Gas valve leaking through, control fault |
| 6 flashes | Rollout switch open, on many boards | Blocked flue, heat exchanger problem |
| Rapid or continuous flashing | Reversed polarity | Line and neutral reversed, poor ground |
Goodman has used several control board suppliers, and some newer communicating models use a two-character display with codes like E0 or b0. Always confirm against the label on the blower door or the model-specific lookup on Goodman’s website.
The Goodman Codes We Fix Most
1 flash: ignition lockout
The furnace tried to light several times without proving flame. A dirty flame sensor is the first suspect, followed by a cracked igniter. Flame sensor cleaning is $245 flat-rate.
3 flashes: pressure switch open
The inducer runs but the switch does not prove draft. Check for snow on the vent pipes and a full condensate pump first. See our pressure switch error guide.
4 flashes: high limit open
The furnace overheated. Replace the filter and open vents. If it repeats, the blower or ductwork needs attention.
Safe Checks Before You Call
- Replace the filter.
- Clear snow from the vent pipes.
- Check the condensate pump and drain.
- Reset power once and watch for the code to return.
What Goodman Code Repairs Cost
| Common repair behind a furnace code | Our flat-rate price |
|---|---|
| Flame sensor cleaning and flame signal test | $245 |
| Flame sensor replacement | $275 |
| Hot surface igniter replacement | $305 |
| Pressure switch hose replacement | $250 |
| Pressure switch replacement | $355 |
| High-efficiency condensate trap cleaning or replacement | $290 |
| High limit switch replacement | $340 |
| Flame rollout switch replacement | $325 |
| Flue or PVC vent pipe repair | $435 |
| Inducer motor replacement | $570 to $1,410 |
| Control board replacement | $475 to $1,505 |
| Gas valve replacement | $505 to $1,120 |
| Blower motor replacement | $830 (PSC) to $2,220 (variable speed) |
Prices are flat-rate with parts and labor, as of November 2026. The $75 diagnostic is waived when you approve the repair, and Comfort Club members save 10 to 15% on repairs. Exact pricing depends on your furnace model and whether the part is in stock on our trucks.
Seeing a Goodman code in the Northwest Suburbs?
Pure Comfort Heating and Cooling services every major furnace brand from our shop in Streamwood, IL. Diagnostics are $75, or $99 on evenings, weekends and holidays, and the fee is waived when you approve the repair. You approve a flat-rate price before any work starts, and phones are answered 24/7.
Other Error Code Guides
- Furnace blinking light codes by brand
- Lennox furnace error codes
- Carrier, Bryant and Payne furnace codes
- Trane and American Standard blink codes
- Furnace pressure switch errors
Frequently Asked Questions
What does 3 flashes mean on a Goodman furnace?
On most Goodman boards, three flashes means the pressure switch did not close. Blocked vent pipes, a clogged condensate trap, a cracked hose or a weak inducer are the usual causes.
What does a rapid flashing light mean on a Goodman furnace?
Continuous rapid flashing usually means reversed polarity, where line and neutral are swapped or the ground is poor.
Are Amana and Daikin furnace codes the same?
They are similar because the same company builds them, but board suppliers vary. Check the label on your blower door.
Do you repair Goodman furnaces?
Yes. We repair Goodman, Amana and Daikin furnaces throughout the Northwest and West Suburbs.
We diagnose and repair furnaces from our shop in Streamwood across Streamwood, Bartlett, Hoffman Estates, Schaumburg, Elgin, Hanover Park, Roselle, Arlington Heights and the rest of the Northwest and West Suburbs. See our furnace repair page for flat-rate prices.