Furnace Fault Codes

Goodman GMVM97 furnace fault codes

Every diagnostic code Goodman publishes for the GMVM97 series — 43 of them — taken from the manufacturer's own per-model fault code database rather than from a general table.

Codes differ between models from the same manufacturer, which is why this list is worth reading in preference to a brand-wide one. Six flashes means a rollout switch on some Goodman models and a rollout limit or a blown control module fuse on others. A count that appears on one board may not exist on another at all.

GMVM97 codes

What the LED showsWhat it means
b0Blower motor is not running
b1Blower communication error
b2Blower motor horsepower mismatch
b3Blower motor operating at a power, temperature, or speed limit
b4Blower motor current trip or lost rotor
b5Blower motor locked rotor
b6Blower motor over or under voltage trip, or over temperature trip
b7Incomplete parameters sent to the motor
b9Low indoor airflow
dDehumidification cooling with a single stage compressor
dFDefrost demand
d0Data not yet on network
d1Dehumidification, low stage cooling, communicating mode
d2Dehumidification, high stage cooling, communicating mode
d4Invalid memory card data
AAirflow display, followed by the CFM value
LED offNo power to the furnace, or an internal control fault
CCompressor cooling with a single stage compressor
C1Low stage compressor, cooling mode
C2High stage compressor, cooling mode
EdRollout switch has tripped
EAReversed 115 volt polarity
ECInducer motor overcurrent
EFAuxiliary switch or input is open
E0Lockout after too many failed ignition attempts
E1Low stage pressure switch closed at the start of the heating cycle
E2Low stage pressure switch stuck open
E3High limit switch is open — the furnace is overheating
E4Flame detected when no flame should be present
E5Low voltage fuse is open
E6Flame signal is too weak
E7Igniter fault or improper grounding
E8High stage pressure switch closed at the start of the heating cycle
E9High stage pressure switch stuck open
FContinuous fan
FtField test mode
HGas heat demand, followed by the demand percentage
HIHigh heat at 100 per cent demand
IFInternal control fault
continuous onNormal operation — no fault stored
PCompressor heating with a single stage compressor
P1Low stage compressor, heating mode
P2High stage compressor, heating mode

Other Goodman models

Amana models

This site is a reference, not a substitute for a licensed HVAC technician. Gas appliances can leak carbon monoxide and cause fire. Anything involving gas lines, the heat exchanger, or the flame sensing circuit should be handled by a licensed professional. Pages are written with AI assistance from the sources listed on each page and checked against them before publishing.

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