Goodman · Furnace

5 flashes Flame sensed with no call for heat

Critical severity Goodman/Amana *MES9 single-stage

What the control is telling you

The control sees flame while the gas valve should be closed. The inducer and circulator blower run continuously and the furnace will not run.

Applies to: GMES9, GCES9, AMES9, ACES9, VMES9, VCES9 (single stage, 92% and 96%)

Likely causes

Short to ground in the flame sense circuit or wire
Flame lingering in the burners
Slow-closing gas valve

Test and repair steps

Turn off power before repairs.
Fix any short at the flame sensor or its wire.
Look for flame left in the burners after shut-off.
Check the gas valve closes promptly and replace it if it does not.

Settings for these units

Normal status displays (7-segment) · Goodman/Amana GM9S96/AM9S96
Normal status displays (7-segment) · Goodman/Amana GM9S80/AM9S80
Normal status displays (7-segment) · Goodman/Amana GM9C96/AM9C96
Minimum recommended filter size · Goodman/Amana GM9C96/AM9C96

Models that show this code

57 models in Goodman/Amana *MES9 single-stage

ACES96ACES960403BNAAACES960603BNAAACES960804CNAAACES961005CNAAACES961205DNAAAMES92AMES920403ANAAAMES920603BNAAAMES920803BNAAAMES920804CNAAAMES920805CNAAAMES921004CNAAAMES921005CNAAAMES921205DNAAAMES96AMES960403ANAAAMES960603BNAAAMES960803BNAAAMES960804CNAAAMES960805CNAAAMES961005CNAAAMES961205DNAAGCES96GCES960403BNAAGCES960603BNAAGCES960804CNAAGCES961005CNAAGCES961205DNAAGMES92GMES920403ANAAGMES920603BNAAGMES920803BNAAGMES920804CNAAGMES920805CNAAGMES921004CNAAGMES921005CNAAGMES921205DNAAGMES96GMES960403ANAAGMES960603BNAAGMES960803BNAAGMES960804CNAAGMES960805CNAAGMES961005CNAAGMES961205DNAAVCES96VCES960403BNAAVCES960603BNAAVCES960804CNAAVCES961005CNAAVMES96VMES960403ANAAVMES960603BNAAVMES960803BNAAVMES960804CNAAVMES961005CNAA

Other codes on the same units

2 flashes Pressure switch stuck closed
3 flashes Pressure switch stuck open
4 flashes Primary or auxiliary limit open
6 flashes Rollout limit open or control fuse blown
7 flashes Low flame signal
8 flashes Igniter relay fault
9 flashes Twinning fault
10 flashes Open fuse - no 24 V at the control

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Source: Goodman Service and Troubleshooting GMES9*/GCES9*/AMES9*/ACES9*/VMES9*/VCES9* (RS6612016r3) , Troubleshooting Chart p.52; LED table p.44. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.