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Goodman gas furnace green light flashing rapidly: Fan-only call

Gas furnace, Canada and United States

A rapidly flashing green light means the thermostat is calling for the fan only (24 V on the G terminal) and the blower is running. It also flashes rapidly while the fault recall button is held down for 5 to 10 seconds.

You can often clear this yourself. Work through the causes below in order, most likely first.

What causes it

  1. This is normal. If you did not mean the blower to run all the time, set the thermostat's fan switch to AUTO.

    Check the thermostat and the power to the furnaceYou can do this

    1. Check the thermostat is working and set to HEAT above the room temperature, or to COOL below it if the problem is with cooling.
    2. If the blower runs all the time, look at the thermostat's fan switch. ON runs the blower constantly; AUTO runs it only while heating or cooling.
    3. Check that the power switch for the furnace, often a switch on or near it, is turned on.
    4. Check the electrical panel for a tripped circuit breaker or a failed fuse for the furnace. Reset the breaker or replace the fuse.
      If the breaker trips again, leave it off and call a qualified servicer.
    5. Make sure both furnace doors are in place. A switch stops the furnace from running while the blower door is off.

How to read this code on your unit

Models that show this code

30 models in 1 range
RangeModels
GMEC96 / GCEC96 / AMEC96 / ACEC96GMEC960302BN, GMEC960303AN, GMEC960402BN, GMEC960403AN, GMEC960603AN, GMEC960603BN, GMEC960803BN, GMEC960804CN, GMEC961004CN, GMEC961005CN, GMEC961205DN, AMEC960302BN, AMEC960303AN, AMEC960402BN, AMEC960403AN, AMEC960603AN, AMEC960603BN, AMEC960803BN, AMEC960804CN, AMEC961004CN, AMEC961005CN, AMEC961205DN, GCEC960403BN, GCEC960603BN, GCEC960803BN, GCEC961005CN, ACEC960403BN, ACEC960603BN, ACEC960803BN, ACEC961005CN

Where this comes from

Checked against the manufacturer's manual on 13 October 2026.

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Other Goodman gas furnace codes

Code Meaning What you can do
IdL Idle, normal operation You can often fix it
1 amber flash Low-stage heat call You can often fix it
2 amber flashes High-stage or single-stage heat call You can often fix it
4 amber flashes Cooling call without a fan signal Safe checks first, then a pro
amber light flashing rapidly Weak flame signal Call a pro
1 green flash Low-stage cooling call You can often fix it
2 green flashes High-stage or single-stage cooling call You can often fix it
steady green light Standby, waiting for a call You can often fix it
light off No power to the control board Safe checks first, then a pro
1 red flash Ignition failure or gas valve fault (depends on model) Safe checks first, then a pro
steady red light Normal operation or control board internal fault (depends on model) Depends on your model
On Normal operation You can often fix it

See all normal operation codes on gas furnaces across brands.