Goodman furnace 2 green flashes: Normal operation — high stage or single stage cooling
Two green flashes means the blower is running for high stage cooling, or for a single-stage air conditioner. It is a normal status indication, not a fault.
Applies to: Goodman GMEC96 and Amana AMEC96 two-stage gas furnaces with a three-colour diagnostic LED, running the indoor blower for a cooling call.
What it means
Goodman's own description covers two cases in one code: high stage cooling on a two-stage system, and cooling on a single-stage compressor. Both look the same to the furnace control, because in both the thermostat is calling for full cooling capacity along with the blower. The furnace is running its blower on the cooling speed and burning no gas. As with one green flash, the value in documenting this is separating it from the fault list. Two red flashes on this board is a pressure switch stuck closed and needs attention; two green flashes needs nothing. Anyone counting flashes without registering colour can move from one to the other without noticing.
Most common causes
- The thermostat is calling for full cooling on a two-stage system.
- A single-stage air conditioner running, which the control reports the same way.
- The blower operating on cooling speed, which is normal during any cooling call.
How to diagnose it
- Confirm the flashes are green. Colour is what separates status from fault on this board.
- Note whether cooling is actually being delivered. If it is, there is nothing here.
- If the blower runs and the air is not cool, look at the outdoor unit and the refrigerant circuit rather than at this code.
How to fix it
- Nothing. The control is reporting that it is doing its part of a cooling call correctly.
Notes
Goodman groups high stage and single stage cooling under one code because the furnace control cannot distinguish them — it sees the same thermostat inputs either way. That is a limitation of the indication rather than an ambiguity in the equipment.
Related
- 1 green flash — Normal operation — low stage cooling
- 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.
What the fix costs
Two green flashes — high-stage or single-stage cooling — is status, not a fault, so the code costs nothing. The adjacent cost worth knowing comes from the blower motor cost guide: when a blower fails to start for a cooling call on furnaces with PSC motors, the culprit is very often a failed capacitor, a $150–350 fix, not the $400–700 motor — the guide calls it the check that saves $500. If a 'dead blower' quote arrives without the capacitor having been tested, ask. And when the blower runs (this code showing, air moving) but the house stays warm, spend your $75–150 diagnostic (repair cost guide) on the outdoor unit instead.
DIY or call a pro?
Yours: filter, registers, confirming which of the three cooling-related green patterns the LED is actually showing, and noting whether air moves. Not yours: the capacitor test — capacitors store a charge after power-off and are exactly the component homeowners get bitten by — and anything refrigerant-side. The useful middle ground is advocacy rather than tools: knowing that a hum-but-no-spin blower is often a cheap capacitor puts you in a position to ask the right question about a quote, which on this fault is routinely worth several hundred dollars.
What this looks like
From the outside, this usually shows up as the blower runs when it should not — that walkthrough covers what to check in order, and when it stops being a homeowner job.