ICP Furnace Control Board for WFAR040A030B1 — OEM | Ships Today

Overview

This is the OEM integrated furnace control board (part number 1184783) for the ICP/Tempstar/Heil WFAR040A030B1 furnace. The control board is the brain of the furnace: it sequences the inducer motor, hot surface igniter, gas valve, and blower while constantly monitoring the pressure switch, limit switch, and flame sensor for safe operation. When the board fails you may see no response to the thermostat, the furnace stuck on a single function, an error flash code on the diagnostic LED, or short cycling. Because the board ties every component together, a confirmed board failure leaves the entire furnace inoperable. This direct OEM replacement restores the full ignition and safety sequence.

Specifications

Compatibility

Direct OEM replacement for the ICP, Tempstar, Heil, and Comfortmaker WFAR040A030B1 model and other units originally fitted with control board 1184783. Match the board part number and connector layout to your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the furnace control compartment service panel.
3. Document — Photograph every connector and wire harness position before disconnecting.
4. Remove — Unplug all harnesses, then unscrew the old board from its standoffs.
5. Install — Mount the new board, transfer any jumpers or DIP-switch settings, and reconnect each harness per your photo.
6. Test — Restore power and confirm a full ignition sequence and normal blower operation on a heat call.

Signs You Need a Replacement

• Furnace completely unresponsive to the thermostat
• Diagnostic LED shows a hard-fault or control error flash code
• Blower or inducer runs continuously or won't start at all
• Short cycling with no consistent fault elsewhere in the system

Shipping & Returns

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