Goodman fault codes

Drive is enabled but stays at min Hz or 0 because analog / serial speed is missing.

1 plate

Ignition retries exceeded on this call.

1 plate

Example on most Carrier/Bryant packaged CES IGC stickers: pressure switch / draft did not make. Confirm the sticker in THIS heat section — revisions differ.

2 plates

Metal-vent draft not proven.

5 plates

Airflow. 80% coils still dirty.

5 plates

Leaking valve or false flame sense.

1 plate

Flame containment.

4 plates

Rod or HSI.

3 plates

Weak µA.

1 plate

Example: internal control / valve circuit on current CES rooftop stickers. Power-cycle once; if 8-flash returns, valve ohms then IGC.

2 plates

L1/N or chassis ground. Sister to rapid flash on some revisions.

1 plate

JADE LCD: ACT ERROR / ACT RANGE. Actuator did not follow command. Feedback pot off the shaft is the weekly.

1 plate

IFC commanded the serial ECM and does not detect it running. Furnace will not operate.

5 plates

IFC cannot communicate with the variable-speed blower. Furnace will not operate.

5 plates

Connected motor horsepower does not match the value in the furnace shared-data set. Furnace will not operate.

4 plates

b2 = motor HP does not match the shared-data set. b3 = motor folding back on power/speed/temp. b9 = airflow below calculated minimum.

1 plate

ECM is folding back on power, speed, or temperature. Furnace keeps running at reduced CFM.

3 plates

Motor tripped or lost rotor position while running.

1 plate

b4 = lost rotor or overload trip (shuts down and retries). b5 = locked rotor after 10 start attempts. b7 = motor parameters missing or failed to start after 40 attempts.

2 plates

Blower cannot turn.

1 plate

IFC rejected the motor’s reported parameters vs shared data.

1 plate

Indoor airflow fell below the calculated minimum. Furnace stages down (high to low) and will halt if CFM reaches 0.

3 plates

JADE LCD: CO2 / SENS ERR. DCV sensor failed or the 0–10 V input is floating. Damper holds open; compressor never runs.

1 plate

ComfortBridge data pair only. Invalid as a diagnosis on a 24V Y1/Y2 hookup.

3 plates

Y1 at the board, compressor not running.

1 plate

IFC cannot read the furnace identity card. Classic after an IFC swap when the card stayed on the old board or in the box.

2 plates

d0 = IFC has no shared-data set (replacement board, missing card) and cannot drive the serial ECM or calculate CFM. d4 = card rejected (wrong model card).

3 plates

Card is present but the data is corrupt, wrong family, or unreadable.

2 plates

Outdoor coil sensor open/short/out of range, or the board will not leave defrost (fan off, RV shifted to cool, long steam).

1 plate

Float switch or tripped condensate opened 24V.

1 plate

Too many failed ignition attempts or flame losses on this call.

9 plates

Low-stage pressure switch is made with the inducer off.

8 plates

Inducer is on low and the low-fire switch will not close.

9 plates

A limit opened. Both blowers typically run until it recloses. Airflow or overfire — not a charge problem. Rollout is still a manual-reset hazard.

9 plates

Rod sees flame with both solenoids de-energized.

9 plates

IFC automotive fuse is open.

9 plates

Flame is present but the micro-amp signal is below the IFC threshold.

9 plates

IFC did not see the igniter circuit behave as commanded.

9 plates

High-stage pressure switch is made with the inducer not on high.

7 plates

Inducer on high, high-fire switch never closes. Classic ‘runs on low, will not go high.’

8 plates

IFC failed its ground check (sister to EEA).

1 plate

Display is E 1 1 — not EE1 (PS closed). Manual-reset rollout. Treat as flame outside the exchanger until proven otherwise.

1 plate

L1/N reversed or chassis ground missing. HSI and flame sense both suffer.

9 plates

Leak / comm / relay alarm from the A2L board when paired with R-32 or R-454B outdoor.

1 plate

Internal (Eb) or external (Ec) gas-valve electrical fault.

3 plates

9-speed ECM current too low (EbL) or unexpected (EbU).

1 plate

Start here when the hood is the complaint. Title 24 FDD classes: sensor, not-economizing, false-economizing, damper not modulating, excess OA.

1 plate

Manual-reset rollout opened. Treat as flame outside the exchanger until proven otherwise. Door chart may render this as a distinctive 7-seg character — confirm on the unit sticker.

3 plates

No line voltage reaching the IFC, door switch open, or an internal control condition. This is power, not a ComfortBridge data-pair code.

4 plates

Too many failed ignition attempts or flame losses on this call.

1 plate

The only pressure switch is made with the inducer off. Display is E E 1 — not E11 (rollout).

1 plate

Inducer is on and the only switch will not close. The winter 96% call on this new 7-seg single.

1 plate

Primary limit opened. Airflow or overfire.

1 plate

Rod sees flame with the solenoid de-energized.

1 plate

24 V fuse on the IFC is open.

1 plate

Flame present, µA below threshold.

1 plate

L1/N reversed or chassis ground missing.

1 plate

Internal (EEb / ASME) or external (EEC) gas-valve electrical fault.

1 plate

IFC internal fault or interrupt loss.

1 plate

IFC failed its ground check (sister to EA).

4 plates

Twinning miswire or twin terminal active on a standalone unit.

2 plates

IFC did not see the igniter circuit behave as commanded.

1 plate

Igniter circuit measures open.

1 plate

Igniter circuit measures open.

3 plates

Drive has line voltage but will not run — the unit board never enabled it.

1 plate

Damper open past the commanded minimum with no economizer or DCV request.

1 plate

Damper open with OA above changeover. Space hot, high OA bills, or wet coil.

1 plate

Controller did not see blower current / pressure.

1 plate

Leak / comm / relay alarm from the A2L board when paired with R-32 or R-454B outdoor.

3 plates

Flame present then dropped, or µA too low to prove.

1 plate

JADE LCD: FREEZING. Mixed air below the low-limit. Damper drives shut; mechanical cool may lock.

1 plate

Keypad example: GF. Drive sees current to ground on the motor leads.

1 plate

Outdoor airflow, overcharge, or restriction opened the high-pressure switch.

6 plates

Airflow or charge.

2 plates

Compressor hums, outdoor fan may run.

2 plates

Normal run states. idle = standby. Ht = heat running (capacity is a percent, not Ht1/Ht2 stages). CF = continuous fan.

1 plate

Normal run states. idle = standby. Ht = heat running (a rate, not Ht1 vs Ht2). CF = continuous fan. CL1 = low cool.

1 plate

Normal run states on the triple display. idle = standby, Ht1/Ht2 = low/high heat, CF = continuous fan, CL1 = low cool.

1 plate

Normal run states on the triple display. idle = standby. Ht1 / Ht2 = low / high heat. CF = continuous fan. CL1 / CL2 = cooling stage.

2 plates

Trial for ignition failed after the IGC retries.

1 plate

L5/L4-class faults on the drive.

1 plate

9-speed ECM current too low.

1 plate

ECM current too low (LE1) or unexpected (UE2).

2 plates

No 120 VAC or no 24 VAC on the IFC. Not a flash code.

2 plates

Heat-exchanger or supply limit opened.

1 plate

Drive is running too slow to close the prove switch, so the unit board reports fan fail. Reliatel example: Fan Fail with the drive still at min Hz.

1 plate

Suction dropped out — charge, indoor airflow, or TXV.

4 plates

Charge, indoor airflow, metering.

2 plates

JADE two-line LCD: MA / SENS ERR. Mixed-air sensor failed. This one alarms immediately on power-up — others wait the 60-minute setup window.

1 plate

Damper is two-position (0 or 100) instead of tracking 2–10 V. Title 24 FDD class.

1 plate

Pressures do not swap with a heat/cool changeover.

1 plate

No 24 VAC at the contactor or the coil is open.

3 plates

OA is in the free-cooling window and the damper stayed shut. Title 24 FDD class.

1 plate

JADE LCD: OA / SENS ERR (or OA SYLK ERR). Outside-air thermistor failed or lost SYLK. Board thinks the roof is 20 °F or 120 °F.

1 plate

Keypad example: oC (Yaskawa) or OC. Output current trip. Locked rotor, dirty filters, or FLA set too low.

1 plate

Keypad example: oH. Drive thermal trip.

1 plate

Fan not running in cool, or not restarting after defrost in heat. Ices the outdoor in heat; high-heads in cool.

1 plate

Keypad example: ov (Yaskawa) or OU. DC bus high. Usually regen on decel, not a new drive.

1 plate

Keypad example: PF. Missing or imbalanced incoming phase.

1 plate

Three-phase monitor opened.

1 plate

Inducer ran (or should have) and the draft switch did not make.

1 plate

JADE LCD: RA / SENS ERR. Return-air thermistor failed. Differential / enthalpy changeover compares OA to RA.

1 plate

L1/N swapped. Not ‘code 10’ and not a high flash count.

1 plate

Flame left the burner box.

1 plate

Unit runs the opposite mode, or pressures never swap when O/B is commanded.

1 plate

Supply or return smoke detector, or a firestat, has the unit locked out.

1 plate

24 V present, no call, no fault. Status.

1 plate

Outdoor iced in heat, or runs cool-mode steam in heat all day.

1 plate

Twinning miswire or twin terminal active on a standalone unit. Door card lists TWIN on 0140F20001-B.

1 plate

Indoor-outdoor data pair. Valid only on a communicating pair (GMVC / AVPTC / AMVC). On a 24V furnace indoor this is a miswire, not a failed outdoor board.

1 plate

Flame with no trial.

1 plate

Keypad example: Uv (Yaskawa) or LU. DC bus dropped. Incoming power or a missing phase.

1 plate

The indoor fan is a drive, not a contactor + cap. Type the keypad string: oC, Uv, ov, GF, oH, PF.

1 plate