ICP Control Board for WPA4424000RKA1 — OEM Circuit Board | Ships Today

Overview

This OEM control circuit board (part number 1178001) is the electronic brain of your ICP WPA4424000RKA1 system. It receives the thermostat signal, manages compressor and fan timing, enforces safety lockouts and anti-short-cycle delays, and sequences the unit's components in the correct order. When a control board fails, the symptoms can be intermittent and frustrating: the system ignores the thermostat, short cycles, fails to start, or runs without responding to commands. Power surges, lightning, moisture intrusion, and burnt relays are common causes of board failure. Installing the exact OEM board ensures correct timing logic and full compatibility with the unit's safeties.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP/Heil/Tempstar/Comfortmaker WPA4424000RKA1 and units using the same control board. Match the part number and connector layout to your original board before installing.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter before handling the board.
2. Access — Remove the service panel to reach the control board.
3. Document — Photograph every connector, plug, and wire position on the board.
4. Remove — Unplug all connectors and remove the mounting screws or standoffs holding the board.
5. Install — Seat the new board on the standoffs and reconnect every plug exactly per your photo.
6. Test — Restore power, call for operation, and confirm correct sequencing and no fault codes.

Signs You Need a Replacement

• System does not respond to the thermostat or runs erratically.
• Persistent short cycling or failure to start.
• Visible burn marks, scorched relays, or a burnt smell on the board.
• Error/fault codes pointing to a control failure.

Shipping & Returns

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