ICP Furnace Control Board for WPG3484115RKC1 — Ignition Control Module | Ships Today
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Overview
This genuine ICP control board package (OEM circuit board 1178358 with ignition control module 1177661) is the electronic brain of the WPG3484115RKC1 package unit. It manages the entire heating sequence — energizing the inducer, proving the pressure switch, timing the igniter warm-up, opening the gas valve, monitoring flame through the sensor, and running safety lockouts. It also coordinates blower timing and relays the thermostat's calls for heat and cool. When the board fails, symptoms range from a completely dead system to intermittent no-heat faults, repeated ignition lockouts, or a blower that runs constantly. A flashing diagnostic LED that no longer follows the published fault codes is a strong sign the board itself has failed.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1178358 (circuit board), 1177661 (ignition control module) |
| Type | Integrated furnace / ignition control board |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Control Voltage | 24 V |
| Function | Ignition sequencing, flame monitoring, blower/relay control, safety lockout |
| Fitment | OEM direct replacement |
| Model | WPG3484115RKC1 |
Compatibility
Direct-fit replacement for the ICP Tempstar Heil WPG3484115RKC1 package unit, matching the original connector layout, mounting standoffs, and diagnostic LED scheme. Confirm the part numbers printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
- Access — Remove the control/blower compartment panel.
- Document — Photograph all wiring harness connections before unplugging anything.
- Remove — Unplug each harness, release the mounting screws/standoffs, and lift the old board out.
- Install — Mount the new board, reconnect every harness exactly per your photo, and seat all locks.
- Test — Restore power, run a full heat cycle, and verify normal ignition and a steady diagnostic LED.
Signs You Need a Replacement
- System completely dead with confirmed 24V transformer output
- Repeated ignition lockouts with no fault in the gas train
- Blower or inducer that runs continuously or won't start
- Diagnostic LED dark, frozen, or flashing nonsensical codes
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days