ICP Ignition Control Board for WPG3484115LKC1 — OEM 1178358 | Ships Today

Overview

This OEM ignition control board (circuit board part number 1178358, with ignition control module 1177661) is the brain of the ICP/Tempstar/Heil WPG3484115LKC1 packaged gas unit. It manages the heating sequence — energizing the inducer, proving the pressure switch, timing the hot surface igniter, opening the gas valve, monitoring flame, and controlling the blower on/off timing — while running safety lockouts and flashing diagnostic fault codes via its LED. A failed board produces erratic behavior: no ignition sequence, blower or inducer that won't start, or a unit that lights and then locks out on a false flame fault.

Specifications

Compatibility

Direct-fit replacement for the ICP/Tempstar/Heil/Comfortmaker WPG3484115LKC1 packaged gas/electric unit and related WPG-series models using OEM board 1178358 with ignition control module 1177661.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter.
2. Access — Remove the control compartment service panel.
3. Document — Photograph every connector and wire location on the existing board before disconnecting.
4. Remove — Unplug all harnesses and spade terminals, then remove the board mounting screws/standoffs.
5. Install — Mount the new board and transfer each connection one at a time, matching your photo exactly.
6. Test — Restore power, call for heat, and verify the full sequence runs and the diagnostic LED shows normal status.

Signs You Need a Replacement

• No response to a heat call — inducer and igniter never sequence
• Diagnostic LED dark, or flashing a hardware/internal fault code
• Blower or inducer runs continuously or not at all
• Visible burnt traces, scorched relays, or corrosion on the board

Shipping & Returns

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