FieldBench

Amana

ASX16

AC · Single-stage outdoor AC · contactor + dual cap

Amana single-stage R-410A condensing unit. Contactor + dual cap. Same story as Goodman GSX16. Not ASXC18 and not the current ALXS4B R-32 box.

Not ASXC18. Not ALXS4B (R-32). Not ASZ14 heat pump.

Walk this in Diagnose

This plate

Stages
Single-stage scroll · contactor
Refrigerant
R-410A
Pair
24V Y
Sister SKU
Goodman GSX16

This board

Contactor + fan — no outdoor PCB to interrogate

  • No 7-seg. Indoor E2 is the furnace.
  • Dual-cap FAN and HERM both matter.

Sequence

  1. Y. 24 VAC at the contactor coil → compressor and outdoor fan. Indoor blower on the cool tap / G.

Faults on this IFC

  • No Y

    Outdoor silent

    warn

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

    • Y and C at the outdoor. Indoor IFC / stat actually closing Y.
    • Contactor coil ohms. Do not confuse a furnace lockout with a dead outdoor.
  • Hum / no start

    Cap / start

    lockout

    Compressor hums, outdoor fan may run.

    • Dual cap (fan and herm). Replace on values, not just a bulge.
    • Hard-start only after the cap and windings are proven.
  • HPS

    High pressure

    lockout

    Outdoor airflow, overcharge, or restriction.

    • Fan running? Coil dirty? SC vs nameplate on a TXV coil.
  • LPS / freeze

    Low pressure

    lockout

    Charge, indoor airflow, metering.

    • Do not add gas on a frozen coil. Indoor filter/coil first.

Workflows

No cool, ASX16

Indoor running, outdoor dead.

  1. 24 VAC at the contactor coil.
  2. Dual cap, then 410A SH (piston) or SC (TXV).
  3. Do not apply ALXS4B R-32 targets.

Test points

Charge
Nameplate + line-set. SH on piston, SC on TXV.
Cap
Dual can. Fan and herm both in spec.

Gotchas

  • ALXS4B is the current R-32 replacement shape — different refrigerant.
  • Goodman GSX16 is the twin.

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