ICP Control Board for WPA4484000RKA1 — OEM Circuit Board | Ships Today

Overview

This genuine ICP control circuit board (OEM #1178001) is the brain of the outdoor unit, coordinating the compressor contactor, fan, and safety inputs based on the 24V thermostat signal. The board reads the control call, manages timing and lockout, and switches the loads that run the system. When a control board fails — from voltage surges, corrosion, heat, or failed relays and traces — symptoms range from a unit that won't start at all, to short-cycling, to a fan or compressor that runs continuously regardless of the thermostat. A scorched relay, burnt connector, or cracked solder joint on the board is a clear sign it needs replacement.

Specifications

Compatibility

Directly fits ICP/Tempstar/Heil condensing unit model WPA4484000RKA1 and related Comfortmaker, Heil, and Tempstar outdoor units that use control board 1178001. Match the board's part number and connector layout to your original before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
2. Access — Remove the electrical access panel to expose the control board.
3. Document — Photograph every connector and wire position on the board before disconnecting.
4. Remove — Unplug each harness, release the board standoffs or screws, and lift the old board out.
5. Install — Seat the new board on its standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power, call for cooling, and verify the board sequences the contactor and fan correctly.

Signs You Need a Replacement

• Unit completely unresponsive to a cooling call
• Short-cycling or erratic compressor/fan operation
• Fan or compressor runs continuously regardless of thermostat
• Visible burn marks, corrosion, 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.