ICP Defrost Control Board for WCH5304GKA200 — Heat Pump | Ships Today

Overview

This OEM defrost control board (part #1173636) manages the defrost cycle on your ICP WCH5304GKA200 heat pump. During heating mode, frost accumulates on the outdoor coil; the defrost board watches coil temperature and run time, then periodically reverses the refrigerant flow to melt the ice and protect both efficiency and the compressor. It also coordinates the timing of the contactor, reversing valve, and fan. When the board fails, the outdoor coil ices over completely, heating output collapses, the unit short-cycles, or it gets stuck in defrost and blows cold air indoors. Because this board orchestrates several major components, an intermittent fault can imitate compressor, fan, or reversing-valve trouble — confirming the board before swapping other parts saves time and money.

Specifications

Compatibility

Direct OEM fit for the ICP WCH5304GKA200 heat pump and shared across many ICP-family Tempstar, Heil, and Comfortmaker heat pump condensers using this defrost board.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the condenser service panel to expose the control board.
3. Document — Photograph every wire and connector position on the board before disconnecting.
4. Remove — Unplug the connectors and defrost sensor, release the board standoffs, and lift out the old board.
5. Install — Mount the new board on the standoffs and reconnect every wire and the defrost sensor per your photo.
6. Test — Restore power, initiate heating, and confirm normal operation and a proper defrost sequence.

Signs You Need a Replacement

• Outdoor coil ices over and never defrosts
• Unit stuck in defrost or blowing cold air in heat mode
• Short-cycling or no response to a heat call
• No timed defrost initiation despite a frosted coil

Shipping & Returns

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