Goodman furnace 2 amber flashes: Normal operation — second stage heat
Two amber flashes means the furnace is running normally on second stage heat, at full firing rate. It is a status indication, not a fault.
Applies to: Goodman GMEC96 and Amana AMEC96 two-stage gas furnaces with a three-colour diagnostic LED.
What it means
A two-stage furnace has a low fire and a high fire. The control shows one amber flash while running on first stage, and two while running on second stage, which is full output. Seeing two amber flashes on a cold morning is the furnace doing exactly what it is designed to do — the thermostat has called for second stage heat, either because the house is well below setpoint or because first stage has run long enough without satisfying it. The reason this is worth a page is that the flash count alone is ambiguous to anyone who does not know the colour matters. Two red flashes on this same board is a pressure switch stuck closed, which is a genuine fault. Two amber flashes is nothing at all. The count is identical; only the colour separates a furnace that is working from one that is not.
Most common causes
- The thermostat is calling for second stage heat (W2), which is the normal reason.
- A large temperature difference between the room and the setpoint, so the furnace goes to high fire.
- Recovery from a setback schedule, when the furnace is bringing the house up quickly.
- Cold outdoor conditions, where first stage alone cannot keep up.
How to diagnose it
- Confirm the flashes are amber and not red. On this board colour is the difference between a status indication and a fault.
- Note whether the house is actually heating. If it is, there is nothing to diagnose.
- If the furnace sits on second stage constantly in mild weather, that is worth mentioning to a technician — it can point at an oversized or undersized system, or a staging setting — but it is not a fault code.
- One amber flash instead means first stage heat, and is equally normal.
How to fix it
- Nothing. This is the furnace reporting normal high-fire operation.
- If the furnace is not producing heat while showing this, the problem is not in the code — have the equipment looked at.
- Do not reset the furnace or cut power to clear this. There is nothing to clear.
Notes
The three-colour LED on this board is genuinely more informative than a single red LED, but it depends on the reader noticing colour. Many people count flashes and stop there, which turns a normal operating indication into an imagined fault.
Related
- 1 amber flash — Normal operation — first stage heat
- 2 red flashes — Pressure switch stuck closed, or an inducer error
All codes for this manufacturer
Goodman and Amana furnace fault codes — every code, with what differs between models.
Not sure this is your brand?
The same count means something else on other furnaces. What 2 flashes means on every brand puts them side by side.
Models this code appears on
From the manufacturer's per-model database. If your model is not listed, this code may not exist on your board, or it may mean something different — check the model page.
Related signal patterns
More signals like this across brands: normal operation signals.
What the fix costs
Two amber flashes is second-stage heat doing its job — nothing to fix, nothing to spend. Its value is as a free instrument: this board tells you, every deep-cold day, whether high fire actually engages. A furnace that never shows two amber flashes in weather that clearly demands full output may have a second-stage problem — on this board that fault announces itself as three double red flashes when the control catches it, but a switch that never closes can also just quietly never fire high. Catching that during a routine $75–150 diagnostic visit (repair cost guide) beats discovering it as insufficient heat during the first hard freeze, when after-hours premiums of $100–200 apply.
DIY or call a pro?
The DIY here is seasonal observation: know what one amber and two amber look like on your furnace, and notice whether the second ever appears once real winter arrives. Filter and registers are yours as always — a starved furnace behaves oddly at every stage. The professional boundary is the second-stage machinery itself: inducer high speed, second-stage pressure switch, and gas valve staging are all live-appliance diagnosis. Mention to the technician whether you have ever seen the two-amber pattern; on a board this legible, 'never once, all winter' is a finding, not small talk.
What this looks like
From the outside, this usually shows up as there is no heat but nothing looks obviously wrong — that walkthrough covers what to check in order, and when it stops being a homeowner job.