Goodman GMEC960803BN Error Code Green 2 Flashes: Normal Operation - High Stage Cooling (Y + G)
What Does Code Green 2 Flashes Mean?
Two green flashes on the Goodman GMEC960803BN's Integrated Control Module indicate normal operation with a high-stage or single-stage cooling call. The thermostat is energizing the Y and G terminals, and the board runs the indoor blower at full cooling speed to match the outdoor unit's full cooling output.
This is the counterpart to green 1 flash (low-stage cooling). When your home needs more cooling than the low stage can deliver, the thermostat steps up to high stage and the board reports it with two green flashes. Single-stage air conditioners also produce this indication because they present a Y call.
Since green signals a normal state, two green flashes during cooling is expected. It confirms the furnace blower and control board are correctly responding to a full cooling demand.
What You'll Notice
- Strong cool airflow from the registers while the air conditioner runs at full capacity
- Two green flashes on the control board during a cooling call
How This Is Diagnosed
No diagnosis is needed — this is a normal high-stage cooling indication. If the system runs constantly on high stage and never satisfies the thermostat, cooling capacity and the outdoor unit are evaluated, but the green 2-flash indication itself only confirms the furnace blower is responding correctly to the high or single-stage cool call.
- The blower shows this cooling indication but the home will not cool down — the outdoor air-conditioning unit or refrigerant charge, not the furnace board, is the likely area to investigate
Frequently Asked Questions
What do two green flashes mean on my Goodman furnace?
They indicate normal high-stage or single-stage cooling operation. The thermostat is calling for full cooling (Y + G) and the furnace blower is running at cooling speed.
Is it a problem that the light shows two flashes instead of one during AC?
No. One green flash is low-stage cooling and two is high or single-stage cooling. Two flashes simply means the system is cooling at full capacity, which is normal on hot days.
✓ Verified against manufacturer service manual — March 2026