ICP Defrost Control Board for WCH5364GKA100 — Heat Pump | Ships Today
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Overview
This OEM defrost control board (part #1173636) is the brain that manages the defrost cycle on your ICP WCH5364GKA100 heat pump. In heating mode, frost builds on the outdoor coil; the defrost board monitors coil temperature and elapsed run time, then periodically reverses the system to melt the ice and protect efficiency and the compressor. The board also coordinates the contactor, reversing valve, and fan timing. When a defrost board fails, the outdoor coil ices over solid, heating performance drops, the unit may short-cycle, or it gets stuck in defrost and blows cold air indoors. Because this board sequences several major components, an intermittent failure can mimic problems with the compressor, fan motor, or reversing valve — so confirming the board is at fault before replacing other parts saves time and money.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Control Voltage | 24 VAC |
| Application | Heat Pump Defrost Cycle |
| Fitment | OEM Replacement |
Compatibility
Direct OEM fit for the ICP WCH5364GKA100 heat pump and shared across many ICP-family Tempstar, Heil, and Comfortmaker heat pump condensers using this defrost board.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the condenser service panel to expose the control board.
- Document — Photograph every wire and connector position on the board before disconnecting.
- Remove — Unplug the connectors and defrost sensor, release the board standoffs, and lift out the old board.
- Install — Mount the new board on the standoffs and reconnect every wire and the defrost sensor per your photo.
- 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.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days