AR9S96

This board

Self-diagnostic IFC · single 7-segment · wiring 0140F20003-B

• door card is wiring 0140F20003-B. Read left to right (Seg3→Seg2→Seg1). Do not kill power — that clears the active code.
• This card prints E0–E7, EA, Eb, Ec, Ed, En — single E plus a character. That is not Goodman GR9S96 EE0 / EE1 / EE2 (three characters).
• One pressure switch only. E1 = stuck closed. E2 = open with inducer on. There is no E8/E9 high-fire pair — leave the AR9T96 page.
• A2L pair codes (FE3, LE4, SE5, rE6) only apply when this furnace is tied to an R-32 / A2L outdoor. Ignore them on R-410A pairs.

Sequence

1. W. IFC proves limits/rollout closed, starts the single-speed inducer.
2. Prove PS. The only pressure switch must close. Already closed with inducer off → E1. Never closes → E2.
3. HSI / valve. Silicon nitride warm-up, then the single solenoid. Open igniter → En / E7. Failures stack toward E0.
4. Blower. Heat-on delay, then the 9-speed ECM on the selected heat tap (factory F02). Wrong tap / F01 on heat is the silent E3.
5. Satisfied. Valve off, inducer post-purge, blower heat-off delay. Unexpected flame after valve-off → E4.

Faults on this IFC

• E0

  Retry / recycle lockout

  lockout

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

  • Watch one full try: inducer, HSI glow, valve click, flame, µA.
  • Gas supply and manifold vs this plate (single-stage — no low/high pair).
  • Ground and flame-rod cleanliness.
  • Do not keep resetting — find which step dies.
• E1

  PS stuck closed

  lockout

  The only pressure switch is made with the inducer off.

  • Unplug the only PS. If the code changes, switch is welded or the hose is holding residual draft.
  • Hose routed downhill to the collector? Water in the hose fakes a closed switch.
  • IFC input shorted — only after the switch ohms open.
  • There is no second (high-fire) switch to confuse with E8.
• E2

  PS open

  lockout

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

  • Inducer spinning? 120 VAC at the inducer on a W call.
  • Collector box, inducer outlet, and condensate trap — this 96% will not make pressure with a full trap.
  • PVC intake/exhaust (bird screen, ice, long run, wind). 1205D is 3" vent — a 2" termination is undersized.
  • Hose dry and on the only collector tap. There is no high-fire hose to move.
• E3

  Open high limit

  warn

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

  • This is a 9-speed ECM. Heat default is F02. F01 is marked not recommended for heating on SS p.7 — that tap is an E3 generator.
  • Filter, blower wheel, A-coil, TES vs the AR9S96 blower chart for this cabinet.
  • Manifold vs rating plate — overfire trips limits with a clean filter.
  • Limit ohms after it cools.
• E4

  Flame when valve should be off

  hazard

  Rod sees flame with the solenoid de-energized.

  • Shut the gas cock. If flame stays, leaking valve — replace, do not jump.
  • Rod shorted to ground or IFC flame circuit.
• E5

  Open fuse

  warn

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

  • 24 V short on W, Y, G, humidifier, or EAC.
  • Unplug tstat harness and replace fuse. If it blows again the short is on the board or gas valve harness.
• E6

  Low flame signal

  warn

  Flame is present but µA is below the IFC threshold.

  • Clean rod with a non-scratch pad — not sandpaper.
  • Chassis ground to burner box and IFC.
  • Manifold pressure / orifice / LP conversion (this plate uses LPM-33, not LPM-34).
• E7

  Igniter relay fault

  lockout

  IFC did not see the igniter circuit behave as commanded.

  • Igniter ohms cold (confirm sticker — nitride, not an 80% Norton chart).
  • 120 VAC to igniter during warm-up.
  • Cracked nitride element.
• EA

  Line polarity / ground

  lockout

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

  • Hot and neutral at the IFC, not just the disconnect.
  • Burner box to IFC ground screw.
• Eb / Ec

  Gas valve circuit

  lockout

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

  • Valve coil ohms, 24 VAC at the harness during trial.
  • Do not apply 24 V to a leaking valve as a ‘test’ and walk away.
• Ed

  Open rollout

  hazard

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

  • Primary exchanger cracks, burner alignment, crossover.
  • Blocked secondary / condensate / flue.
  • Reset only after the cause is fixed. Recurring rollout is a CO / fire call.
• En

  Igniter open

  lockout

  Igniter circuit measures open.

  • Ohms at the igniter plug, then at the IFC.
  • Harness rub-through on the collector.
• EEH

  Grounding error

  lockout

  IFC failed its ground check (sister to EA).

  • Green ground to cabinet and IFC.
  • Painted screw, missing star washer.
• LE1 / UE2

  Circulator current

  lockout

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

  • Harness seated at motor and IFC. 9-speed ECM is tap-driven — a half-seated plug throws these.
  • Locked rotor, wet winding, or wrong motor for the cabinet.
  • Do not put a PSC motor or a ComfortBridge serial ECM on this IFC.
• FE3 / LE4 / SE5 / rE6

  A2L mitigation

  hazard

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

  • Only valid on A2L pairs. On 410A, this is a miswired mitigation harness.
  • Leak sensor location, ventilation blower, and OEM mitigation sequence before you condemn the IFC.

Workflows

Test points

Pressure switch

One NO switch. Closed only after inducer is up. There is no high-fire hose.

Manifold

Single-stage plate value only — no low/high pair. Rating plate wins.

Flame rod

Typically ≥ 1.0 µA DC on this IFC family — confirm door chart. Rising while running is the goal.

HSI

Nitride, 120 VAC during warm-up. Cold ohms per sticker — do not use an 80% Norton chart.

ECM taps

Heat default F02. Cool/Y/G default F04. F01 not recommended for heating (SS p.7). Rise is cabinet-specific (25–55 on 0403AN through 35–65 on 80–120 kBtu).

Gotchas

• Looks like AR9T96 until you count pressure-switch hoses. One hose = this page. Two hoses = AR9T96.
• Goodman GR9S96 is not this door card. GR9S96 speaks EE0/EE1/EE2. This Amana card is E0–E7 on 0140F20003-B.
• LPM-33 is the LP kit on both upflow and downflow. Do not grab LPM-34 (AR9T96 / ARVT96) or LPM-31 (AR9S80).
• F01 on heat is an E3 callback. SS marks it not recommended for heating. Leave heat on F02 unless the rise chart says otherwise.
• Bottom return: unfold the flanges. SS notes ~18% airflow loss if you leave them folded.
• 1205D is 3" vent only. A 2" concentric (72950) is not listed for that cabinet — use 72951.
• A leftover W2 from a previous two-stage furnace does nothing useful here and confuses the next tech. Cap it.

Related plates

• amana-ar9t96 — Two-stage 9-speed cousin — dual PS, 0140F20004-B, E8/E9 high fire. Wrong chart if you only have one hose.
• amana-ar9s80 — 80% single-stage 9-speed — Cat I 4" metal vent, 0140F20001-B, LPM-31. E2 is a chimney, not a trap.
• amana-arvt96 — ComfortBridge two-stage VS R-32. Triple 7-seg + serial ECM. Not this tap IFC.
• amana-am9s96 — Older single-stage 96% flash sibling. LED 1–9, not this 7-seg E-card.
• goodman-gr9s96 — Goodman single-stage 9-speed cousin — EE0/EE1/EE2 three-character card, not this E0–E7 door.