ICP Control Board for WPH3604000RKC1 — OEM Circuit Board | Ships Today

Overview

This OEM control circuit board (part number 1178001) is the electronic brain of your ICP/Tempstar/Heil WPH3604000RKC1 heat pump. It manages the operating sequence — receiving thermostat calls, sequencing the compressor, condenser fan, reversing valve, and defrost cycle, and enforcing safety lockouts. Control boards fail from power surges, lightning, moisture, corrosion, and heat stress on relays and solder joints. A failed board typically shows up as a unit that won't respond to the thermostat, a defrost cycle that runs incorrectly or never, relays that won't energize loads, or intermittent no-starts. Replacing the board restores the system's control logic and timing.

Specifications

Compatibility

Direct OEM fit for the ICP/Tempstar/Heil WPH3604000RKC1 heat pump. Confirm the printed part number on your existing board before ordering, as board revisions can differ by model.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter before touching the board.
2. Access — Remove the control compartment service panel.
3. Document — Photograph every wire and connector position on the board.
4. Remove — Unplug the harnesses, release the board standoffs, and lift out the old board.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly as photographed.
6. Test — Restore power and confirm proper startup, fan/compressor operation, and defrost sequencing.

Signs You Need a Replacement

• Unit does not respond to thermostat calls
• Defrost cycle runs incorrectly or never initiates
• Relays don't click or loads won't energize
• Visible scorching, corrosion, or burnt components on the board

Shipping & Returns

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