ICP Control Board for WPH3304000RKC1 — OEM Circuit Board | Ships Today

Overview

This genuine OEM control circuit board (part 1178001) is the brain of the ICP / Tempstar / Heil WPH3304000RKC1 packaged heat pump. It manages the defrost timing, reversing valve sequencing, compressor and fan relays, and the safety interlocks that protect the system. When the board fails you may see no response to thermostat calls, a unit stuck in defrost, a compressor that won't start, or erratic switching between heating and cooling. Replacing a failed board restores reliable, sequenced operation.

Specifications

Compatibility

Designed for the ICP WPH3304000RKC1 packaged heat pump and its Tempstar, Heil, and Comfortmaker equivalents. Match the part number printed on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control-access service panel.
3. Document — Photo every wire and terminal position on the old board.
4. Remove — Unplug the harnesses, release the mounting standoffs, and lift out the old board.
5. Install — Seat the new board on the standoffs and reconnect each harness per your photo.
6. Test — Restore power, run a heat and a cool call, and confirm defrost and reversing-valve sequencing.

Signs You Need a Replacement

• No response to thermostat calls despite 24V present.
• Unit stuck in or never entering defrost.
• Compressor or fan relay chatters or won't energize.
• Visible burn marks, swollen capacitors, or scorched traces on the board.

Shipping & Returns

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