ICP Control Board for WPA4604000RKA1 — OEM Circuit Board | Ships Today

Overview

This OEM control circuit board (part #1178001) is the brain of your ICP WPA4604000RKA1 unit, managing the sequencing of the compressor, fan, and safety circuits and interpreting the 24V signals from the thermostat. It coordinates timing delays, monitors safety inputs, and energizes the relays that bring the system online. When a control board fails — from power surges, corrosion, burnt relays, or failed components — the unit may run erratically, ignore thermostat calls, short-cycle, or refuse to operate entirely. Replacing the board with the correct OEM part restores proper, safe system logic.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP WPA4604000RKA1 unit and related Tempstar, Heil, and Comfortmaker equipment using this control board. Match the part number on your existing board before ordering, as control boards are model-specific.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control compartment access panel.
3. Document — Photograph every wire and connector on the board before disconnecting.
4. Remove — Unplug all harnesses and terminals, then unscrew or unclip the board from its standoffs.
5. Install — Mount the new board and reconnect every wire and connector exactly per your photo.
6. Test — Restore power, call for operation, and confirm correct sequencing of fan and compressor.

Signs You Need a Replacement

• Unit ignores thermostat calls or runs erratically.
• System short-cycles or fails to sequence correctly.
• Visible burn marks, corrosion, or damaged relays on the board.
• No diagnostic LED activity or fault codes that point to the board.

Shipping & Returns

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