ICP Defrost Control Board for WCH3244GKA1 — Heat Pump | Ships Today
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Overview
This is a genuine OEM defrost control board for the ICP / Heil / Tempstar WCH3244GKA1 heat pump. The defrost board is the brain of the outdoor unit's defrost cycle: it monitors the defrost thermostat and time intervals, energizes the reversing valve, stops the condenser fan, and runs the unit briefly in cooling mode to melt frost off the outdoor coil during cold-weather heating. When the defrost board fails, the heat pump can ice over and lose heating capacity, run defrost cycles too often or never at all, fail to start the compressor or fan, or trip on high pressure. Symptoms include a frosted or iced outdoor coil, no defrost cycle, a unit that won't energize the fan or compressor, and erratic mode switching.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | ICP (Heil / Tempstar / Comfortmaker) |
| Control Voltage | 24V |
| Application | Heat Pump Defrost Control |
| Fitment | OEM Replacement |
Compatibility
Direct OEM replacement for the ICP / Heil / Tempstar WCH3244GKA1 heat pump condensing unit. This defrost board is used across many ICP-family heat pumps with the same defrost control logic. Match OEM part number 1173636 and the terminal/connector layout to your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
- Access — Remove the condenser electrical access panel to expose the control board.
- Document — Photograph every wire, plug, and terminal position on the old board before disconnecting.
- Remove — Unplug the harnesses, release the board standoffs/screws, and lift out the old board.
- Install — Mount the new defrost board and reconnect every connector exactly per your photo; transfer any jumper/timer settings.
- Test — Restore power, run a heating call, and confirm normal operation and a proper forced or timed defrost cycle.
Signs You Need a Replacement
- Outdoor coil ices or frosts over and won't clear
- No defrost cycle, or defrost runs far too frequently
- Compressor or condenser fan won't energize
- Erratic reversing valve / mode switching during heating
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the 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