FieldBench
Board cross-reference
ICMSingle-stage (same job as 50M56U-843)

ICM2812

Board-only twin of WR 50M56U-843

Igniter

120 VAC HSI — same rules as the WR kit

Motor

PSC / conventional — same limits as 50M56U-843

Replace list

  • White-Rodgers 50M56U-843 board only (ICM).
  • ICM2812-KIT adds the harness pack and is the 150–200 OEM-SKU universal.

Will not replace

  • Anything 50M56U-843 will not replace (HK42FZ013, 11-pin bar, two-stage, 9-speed tap, communicating).

Field notes

  • Buy ICM2812 if the 50M56U-843 board is what failed and you already have the harness.
  • Buy ICM2812-KIT (or the WR kit) when you are crossing an OEM silk and need the lettered plugs.

Plates that name this carton

  • Read the silk

    This is the Bryant plate where ICM282B / 50M56U actually apply — if the silk is HK42FZ004–016/034.

    Silk: HK42FZ004 · HK42FZ007 · HK42FZ008 · HK42FZ009 · HK42FZ011 · HK42FZ013 · HK42FZ016 · HK42FZ034

    White-Rodgers

    • 50M56U-843

      WR kit lists HK42FZ004/007/008/009/011/016 — not 013, not an 11-pin bar.

    ICM

    • ICM282B

      ICM for HK42FZ004/007/008/009/011/013/016/034. 013 is on this list (not on 50M56U).

    • ICM2812

      ICM2812 / 2812-KIT is the 50M56U-843 twin when you want the ICM carton.

    Honeywell

    • S9200U1000

      Only if the silk is already a 50A50 / 50A55 (S9200U lists 50A55-843). Not an HK42FZ drop-in.

    • HK42FZ017 two-stage (ICM2807) unless that is the silk.
    • Evolution 987M / 986T. 926T VS two-stage.
    • 50A55-843 onto a VS motor if this cabinet was upgraded — read the motor plug.
    916S chart