Fault codes

Amana ALXS4B

No Y Outdoor silent

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

Amana ALXS4B

Hum / no start Cap / start

Compressor hums, outdoor fan may run.

Amana ALXS4B

HPS High pressure

Outdoor airflow, overcharge, or restriction.

Amana ALXS4B

LPS / freeze Low pressure

Charge, indoor airflow, metering.

Amana ALXT7C

HPS High pressure

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

Amana ALXT7C

LPS Low pressure / freeze

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

Amana ALXT7C

Comm Indoor/outdoor data

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

Amana AM9S96

1 flash Retry lockout

Ignition retries exceeded.

Amana AM9S96

2 flash PS closed, inducer off

Single switch welded or IFC input shorted.

Amana AM9S96

3 flash PS open, inducer on

Draft / trap / hose / inducer.

Amana AM9S96

4 flash Open limit

Airflow or overfire.

Amana AM9S96

5 flash Flame with valve off

Leaking valve or false flame sense.

Amana AM9S96

6 flash Rollout open

Flame containment.

Amana AM9S96

7 flash Low flame

Weak µA.

Amana AM9S96

8 flash Igniter fault

Open / cracked HSI.

Amana AM9S96

9 flash Polarity / ground

L1/N or chassis ground.

Amana AMVC96

idle / Ht1 / Ht2 / CF / CL1 / CL2 Status, not a fault

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

Amana AMVC96

E0 System / ignition lockout

Control failed to sense flame after 3 full ignition retries and shut off gas. Auto-resets after 1 hour (or a tstat cycle).

Amana AMVC96

E1 Low-stage PS stuck closed

Low-stage pressure switch is made with the inducer off. Control waits for the fault to clear.

Amana AMVC96

E2 Low-stage PS stuck open

Inducer is on low and the low-stage switch did not close within 5 minutes. Then 1-hour lockout and retry.

Amana AMVC96

E3 Open primary / aux / rollout limit

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

Amana AMVC96

E4 Flame sensed with no call for heat

Rod sees flame with both solenoids de-energized. Control runs circulator and inducer and will not fire again.

Amana AMVC96

E5 Open 24V fuse

Low-voltage fuse on the IFC is open. All furnace operation is inhibited except the error display.

Amana AMVC96

E6 Low flame-sense µA

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

Amana AMVC96

E7 Igniter open / no-ground

Igniter is open, not connected, or the IFC failed its ground check on the igniter circuit.

Amana AMVC96

E8 High-stage PS stuck closed

High-stage pressure switch is made with the inducer not on high. Furnace runs low only regardless of demand.

Amana AMVC96

E9 High-stage PS stuck open

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

Amana AMVC96

EA Reversed polarity / poor ground

L1/N reversed or chassis ground missing. HSI and flame sense both suffer. Furnace will not operate.

Amana AMVC96

EE No 115V to control / internal / door switch

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

Amana AMVC96

b0 ECM blower not running

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

Amana AMVC96

b1 ECM communications lost

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

Amana AMVC96

b2 Motor HP mismatch vs shared-data set

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

Amana AMVC96

b3 Motor limiting (power / speed / temp)

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

Amana AMVC96

b4 / b5 / b7 Motor trip / locked rotor / failed start

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.

Amana AMVC96

b9 Low indoor airflow

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

Amana AMVC96

d0 / d4 Shared data / memory card

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).

Amana AMVM97

idle / Ht / CF Status, not a fault

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

Amana AMVM97

E0 System / ignition lockout

Failed to sense flame after 3 retries. 1-hour auto reset.

Amana AMVM97

E2 Pressure-band open / inducer will not prove

Variable inducer is running and the pressure switch / band for that rate never made. Same 96% trap/hose/vent physics as other Amana condensing furnaces — not ‘unplug the low-fire tee.’

Amana AMVM97

E3 Open primary / aux / rollout limit

Limit opened. Airflow or overfire. Rollout is still a manual-reset hazard.

Amana AMVM97

E4 Flame sensed with no call for heat

Rod sees flame with the modulating valve commanded closed.

Amana AMVM97

E5 Open 24V fuse

Low-voltage fuse open. Operation inhibited except the display.

Amana AMVM97

E6 Low flame-sense µA

Flame present, signal below threshold. Lazy flame at a low modulating rate is a common miss.

Amana AMVM97

E7 Igniter open / no-ground

Igniter open, unplugged, or ground check failed.

Amana AMVM97

E9 High-capacity pressure band open

Inducer will not make the high-rate draft band. This is not ‘the high-fire PS tee on a two-stage collector.’ The unit may run at a reduced percent and never reach high fire.

Amana AMVM97

EA Reversed polarity / poor ground

L1/N reversed or chassis ground missing. Furnace will not operate.

Amana AMVM97

EE No 115V to control / internal / door switch

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

Amana AMVM97

b0 ECM blower not running

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

Amana AMVM97

b1 ECM communications lost

IFC cannot talk to the variable-speed blower.

Amana AMVM97

b2 / b3 / b9 Motor HP / limiting / low CFM

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

Amana AMVM97

d0 / d4 Shared data / memory card

d0 = no shared-data set on a replacement IFC. d4 = wrong-model card.

Amana AR9S80

E0 Retry / recycle lockout

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

Amana AR9S80

E1 PS stuck closed

The only pressure switch is made with the inducer off.

Amana AR9S80

E2 PS open — metal-vent draft

Inducer is on and the only switch will not close. This is a chimney / B-vent / 4" metal / inducer call — not a drowned 96% trap.

Amana AR9S80

E3 Open high limit

Primary limit opened. Airflow or overfire.

Amana AR9S80

E4 Flame when valve should be off

Rod sees flame with the solenoid de-energized.

Amana AR9S80

E5 Open fuse

24 V fuse on the IFC is open.

Amana AR9S80

E6 Low flame signal

Flame present, µA below threshold.

Amana AR9S80

E7 Igniter relay fault

IFC did not see the igniter circuit behave as commanded.

Amana AR9S80

EA Line polarity / ground

L1/N reversed or chassis ground missing.

Amana AR9S80

Eb / Ec Gas valve circuit

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

Amana AR9S80

Ed Open rollout

Manual-reset rollout. Treat as flame outside the exchanger until proven otherwise.

Amana AR9S80

En Igniter open

Igniter circuit measures open.

Amana AR9S80

EEH Grounding error

IFC failed its ground check (sister to EA).

Amana AR9S80

TWIN Twin error

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

Amana AR9S80

LE1 Low circulator current

9-speed ECM current too low.

Amana AR9S80

FE3 / LE4 / SE5 / rE6 A2L mitigation

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

Amana AR9S96

E0 Retry / recycle lockout

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

Amana AR9S96

E1 PS stuck closed

The only pressure switch is made with the inducer off.

Amana AR9S96

E2 PS open

Inducer is on and the only switch will not close. Classic overnight 96% collector / trap call.

Amana AR9S96

E3 Open high limit

Primary limit opened. Airflow or overfire — not a charge problem.

Amana AR9S96

E4 Flame when valve should be off

Rod sees flame with the solenoid de-energized.

Amana AR9S96

E5 Open fuse

3 A (typical) automotive fuse on the IFC is open.

Amana AR9S96

E6 Low flame signal

Flame is present but µA is below the IFC threshold.

Amana AR9S96

E7 Igniter relay fault

IFC did not see the igniter circuit behave as commanded.

Amana AR9S96

EA Line polarity / ground

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

Amana AR9S96

Eb / Ec Gas valve circuit

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

Amana AR9S96

Ed Open rollout

Manual-reset rollout opened. Treat as flame outside the exchanger until proven otherwise.

Amana AR9S96

En Igniter open

Igniter circuit measures open.

Amana AR9S96

EEH Grounding error

IFC failed its ground check (sister to EA).