ICP Control Board for WPA4304000RKA1 — OEM Circuit Board | Ships Today

Overview

This genuine OEM control circuit board (OEM part #1178001) is the electronic brain of the ICP/Tempstar/Heil WPA4304000RKA1 system. The board sequences operation — managing the blower, control relays, safety inputs, and timing logic in response to thermostat calls. When the board fails, the symptoms can mimic many other failures: no response to the thermostat, blower that won't start or won't stop, intermittent operation, or fault LED codes that won't clear. Installing a known-good OEM board restores correct, code-compliant control sequencing and eliminates the guesswork of chasing a phantom electrical fault.

Specifications

Compatibility

Direct OEM replacement control board for the ICP/Tempstar/Heil model WPA4304000RKA1. Match the part number and board layout/connector positions to your existing board before installing, as control boards are revision-specific.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control/electrical service panel.
3. Document — Photograph every connector and the position of each wire harness on the board.
4. Remove — Unplug all harnesses and unscrew/unclip the old board from its standoffs.
5. Install — Mount the new board, transfer any jumpers/dip-switch settings, and reconnect all harnesses per your photo.
6. Test — Restore power, run a full heating/cooling cycle, and confirm there are no fault codes.

Signs You Need a Replacement

• System unresponsive to thermostat calls
• Blower or relays won't energize, or won't shut off
• Intermittent operation or repeating fault/error LED codes
• Visible scorching, burnt traces, or a failed relay on the board

Shipping & Returns

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