ICP Defrost Control Board for YL036GB1 — Heat Pump | Ships Today
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Overview
This genuine OEM defrost control board (Part #1069364) is the brain of the defrost cycle on the ICP/Tempstar/Heil YL036GB1 heat pump. In heating mode, frost and ice build on the outdoor coil; the defrost board monitors coil temperature and elapsed run time, then commands the reversing valve and condenser fan to melt that ice and restore efficiency. It coordinates the compressor contactor, the 24V reversing valve coil, the defrost sensor, and the auxiliary/emergency heat call. When this board fails, the heat pump may ice over solid, run a never-ending defrost, blow cold air during heating, or refuse to switch between heating and cooling. Because the board governs both comfort and equipment protection, a failing unit should be replaced promptly.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1069364 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Function | Defrost timing, reversing valve & fan control |
| Fits Model | YL036GB1 |
Compatibility
Direct factory replacement for the ICP/Tempstar/Heil YL036GB1 outdoor heat pump. The same board services numerous related ICP-family heat-pump condensers that share this defrost control platform. Match the OEM part number and connector layout to your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter before touching the board.
- Access — Remove the condenser control-panel cover to reach the board.
- Document — Photograph every harness, plug, and spade terminal before unplugging.
- Remove — Unplug the wiring connectors, release the standoffs or screws, and lift out the old board.
- Install — Snap in the new board and reconnect each connector exactly per your photo.
- Test — Restore power and confirm normal heating, cooling, and a clean defrost cycle.
Signs You Need a Replacement
- Outdoor coil icing over and never defrosting
- Heat pump stuck in continuous defrost or blowing cold air in heat mode
- Unit won't switch between heating and cooling
- No 24V output to the reversing valve or fan during defrost
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