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 indicate the blower is running for a high-stage or single-stage cooling call. The control board is receiving signals on both the Y (cooling) and G (fan) terminals from the thermostat, commanding the blower to operate at the higher speed configured for full-capacity air conditioning.
In a two-stage cooling setup, high-stage activates when the low stage cannot meet the cooling demand — typically during very hot weather or when the home's temperature is significantly above the thermostat setpoint. In a single-stage cooling system, this is the only cooling speed available and activates any time the air conditioner runs.
This is a normal operating state confirming the blower is running at the correct speed for the cooling demand. The blower will return to standby or a lower speed once the thermostat is satisfied. If you notice the air conditioner seems to run in high stage constantly without adequately cooling the home, the AC system itself may need professional service.
- If the system constantly runs in high-stage cooling without reaching the setpoint temperature — the air conditioner refrigerant, outdoor unit, or ductwork sizing may need professional evaluation
✓ Verified against manufacturer service manual — March 2026