ICP Defrost Control Board for WCH3302GKA1 — Heat Pump | Ships Today
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Overview
This is a genuine OEM defrost control board (OEM part #1173636) for the ICP/Heil/Tempstar WCH3302GKA1 heat pump. The defrost board is the brain of the outdoor unit's heating operation — it monitors the coil temperature sensor and run time, then initiates a defrost cycle to melt ice off the outdoor coil by energizing the reversing valve and pausing the outdoor fan. It also handles compressor timing/anti-short-cycle protection. When this board fails, the heat pump may ice over, fail to defrost, lock out the compressor, or behave erratically in heating mode.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1173636 |
| Description | Defrost Control Board |
| Type | Defrost / Heat Pump Control Board |
| Brand | ICP / Heil / Tempstar / Comfortmaker |
| Control Voltage | 24 VAC |
| Fits Model | WCH3302GKA1 |
Compatibility
Designed as a direct OEM replacement for the ICP/Heil/Tempstar WCH3302GKA1 heat pump. Defrost boards are model/series specific — match the OEM part number and connector layout before installing, and confirm the coil sensor is compatible.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the condenser service/electrical panel.
- Document — Photograph every plug and wire position before disconnecting.
- Remove — Unplug the connectors, release the standoffs/screws, and lift out the old board.
- Install — Mount the new board and reconnect each plug to match your photo and the wiring diagram.
- Test — Restore power, run a heating call, and verify normal operation and defrost initiation.
Signs You Need a Replacement
- Outdoor coil ices up and never defrosts
- Heat pump won't switch into or out of defrost
- Compressor lockout or no outdoor unit operation in heat
- Erratic timing, short cycling, or failed control diagnostics
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