AM9S96

This board

Single-stage IFC · red LED flash or basic 7-seg

• Count flashes between the long pause. Rapid flash is polarity, not ‘code 10’.
• LED off = no 120/24. LED steady on (some revs) = idle with 24 V present.
• One pressure switch only. 2-flash closed-with-inducer-off, 3-flash open-with-inducer-on.
• Do not read this as an AR9T96 E-code card or an AMVC96 triple-7-seg menu.

Sequence

1. W. Inducer on → single PS closes → HSI → valve → flame → blower delay.
2. Prove. One NO pressure switch. Already closed with inducer off → 2-flash. Never closes → 3-flash.
3. No W2 path. There is no high-fire prove. A ‘W2’ wire is unused or tied for an AC stage, not furnace high fire.

Faults on this IFC

• 1 flash

  Retry lockout

  lockout

  Ignition retries exceeded.

  • Watch one full try: inducer, HSI glow, valve click, flame.
  • Gas cock, manifold vs plate, orifice.
  • Rod µA and chassis ground.
  • Do not keep resetting — find which step dies.
• 2 flash

  PS closed, inducer off

  lockout

  Single switch welded or IFC input shorted.

  • Unplug the only PS. Code change = switch or water in the hose.
  • Hose routed downhill? Residual draft fakes closed.
  • IFC input shorted — only after the switch ohms open.
• 3 flash

  PS open, inducer on

  lockout

  Draft / trap / hose / inducer.

  • Trap, collector, and vent first — these 96%s drown a collector overnight.
  • Inducer 120 VAC and spinning.
  • Hose dry and on the only collector tap.
  • If the PS closes and the IFC still 3-flashes, the IFC input is the fault.
• 4 flash

  Open limit

  warn

  Airflow or overfire.

  • Filter, coil, return, heat-speed tap. A 96% coil on a low heat tap will limit.
  • Rise vs rating plate.
  • Clock the meter — overfire trips limits with a clean filter.
• 5 flash

  Flame with valve off

  hazard

  Leaking valve or false flame sense.

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

  Rollout open

  hazard

  Flame containment.

  • Exchanger, burners, flue.
  • Blocked secondary / condensate.
  • Reset only after the cause is fixed. Recurring rollout is a CO / fire call.
• 7 flash

  Low flame

  warn

  Weak µA.

  • Clean rod with a non-scratch pad — not sandpaper.
  • Chassis ground to burner box and IFC.
  • Manifold / orifice / LP conversion.
• 8 flash

  Igniter fault

  lockout

  Open / cracked HSI.

  • Ohms at the igniter plug, then at the IFC.
  • 120 VAC during trial.
  • Cracked nitride element.
• 9 flash

  Polarity / ground

  lockout

  L1/N or chassis ground.

  • Hot and neutral at the IFC, not just the disconnect.
  • Burner-box ground screw.
  • Rapid flash on some revs is the same polarity complaint, not a high count.

Workflows

Test points

Pressure switch

One NO switch. Closed only after inducer is up.

Manifold

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

Flame rod

µA per this door card. Rising while running is the goal.

HSI

Nitride, 120 VAC during warm-up. Cold ohms per sticker.

Heat tap / rise

Match the installer’s tap to the rise range on the rating plate (typically 35–65°F).

Gotchas

• GMSS96 is the Goodman-badge listing of this flash family — use the Goodman GMSS96 chart, not this alias.
• A leftover W2 from a previous two-stage furnace does nothing useful here and confuses the next tech.
• Do not install a second pressure switch ‘because two-stage boards have two.’
• AR9T96 E8/E9 and AMVC96 b/d codes do not apply. One switch, flash count, conventional 24V.

Related plates

• amana-ar9s96 — Current single-stage 9-speed 96% — 7-seg E0–E7 on 0140F20003-B, not this LED 1–9 flash card.
• amana-ar9t96 — Two-stage 9-speed cousin — dual PS, 7-seg E1/E2 vs E8/E9. Do not use that chart on this single-stage flash IFC.
• amana-amvc96 — ComfortBridge communicating VS cousin. Triple 7-seg, serial ECM, memory card. Not this board.