ICP Defrost Control Board for WCH3364GKA1 – OEM 1173636 | Ships Today
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Overview
The OEM defrost control board (part number 1173636) is the brain of the defrost cycle on your ICP/Tempstar/Heil WCH3364GKA1 heat pump. It monitors coil temperature and run time, then commands the unit into defrost to clear ice from the outdoor coil during heating operation. When this board fails, the heat pump may ice over completely, run continuous defrost, fail to switch into heating, or trip on high head pressure. Replacing the board with a genuine OEM part restores correct defrost timing and protects the compressor from liquid slugging.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Application | Heat Pump – Defrost Control |
| Fit | OEM Direct Replacement |
Compatibility
Direct factory replacement for the ICP WCH3364GKA1 heat pump and other ICP-family condensing units that originally shipped with board 1173636. Always confirm the printed part number on your existing board before ordering.
Installation Guide
- Safety First – Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
- Access – Remove the outdoor unit's control-panel service cover.
- Document – Photograph every wire and terminal position before disconnecting anything.
- Remove – Unplug the wire harnesses, release the standoffs or mounting screws, and lift out the old board.
- Install – Snap the new board onto the standoffs and reconnect every harness exactly as photographed.
- Test – Restore power, confirm normal startup, and verify a forced or timed defrost cycle initiates correctly.
Signs You Need a Replacement
- Outdoor coil freezes solid and never defrosts.
- Unit gets stuck in continuous defrost mode.
- No heating output or no compressor/reversing-valve operation.
- Visible burnt traces, scorched relays, or corrosion on the board.
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