ICP Furnace Control Board for WFSR100C042A1 — OEM 1184783 | Ships Today

Overview

This OEM integrated furnace control board (part 1184783) is the brain of the ICP Tempstar/Heil WFSR100C042A1 furnace. It manages the entire heating sequence — inducer startup, pressure switch proving, hot surface igniter timing, gas valve operation, flame sensing, and blower on/off delays — and provides safety lockouts and diagnostic fault codes via its onboard LED. When this board fails, symptoms range from a completely dead furnace to erratic cycling, blower or igniter that won't energize, or repeated lockouts with no clear cause. Replacing it with the correct OEM control board restores proper sequencing, safety functions, and diagnostics.

Specifications

Compatibility

Directly fits the ICP Tempstar/Heil WFSR100C042A1 furnace and related ICP-family models using this integrated control. Match the OEM part number on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control/blower compartment panel.
3. Document — Photograph every wire and connector location on the old board before disconnecting anything.
4. Remove — Unplug the harnesses, remove the mounting screws, and lift out the old board.
5. Install — Mount the new board, transfer each connector to the matching terminal exactly per the photo, and set any DIP switches/jumpers to match the original.
6. Test — Restore power, run a full heat cycle, and confirm proper sequencing and a normal status LED with no fault codes.

Signs You Need a Replacement

• Furnace completely dead even with 24V control power present.
• Igniter, inducer, or blower fails to energize in sequence.
• Error/fault code on the board LED indicating a control failure.
• Erratic short-cycling or random lockouts with no other faults found.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.