ICP Defrost Control Board for YL042GB1 — Heat Pump Timer Board | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This OEM defrost control board (ICP part #1069364) is the brain of the outdoor defrost cycle on your ICP / Tempstar / Heil YL042GB1 heat pump. It monitors the defrost thermostat and ambient conditions, times the defrost interval, energizes the reversing valve, and shuts the outdoor fan off so the coil can shed ice in cold weather. A failed board is a common cause of a heat pump that ices over solid in winter, never defrosts, defrosts constantly, or won't switch the reversing valve. Replacing the board restores proper defrost timing and protects the coil and compressor.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1069364 |
| Type | Defrost Control Board (Heat Pump) |
| Brand | ICP (Tempstar / Heil) |
| Function | Defrost timing, reversing valve & outdoor fan control |
| Fitment | OEM Replacement |
Compatibility
Designed for the ICP / Tempstar / Heil YL042GB1 heat pump and related ICP-family outdoor units using this defrost board. Match the part number and connector layout to your existing board before ordering.
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 reach the control box.
- Document — Photograph every plug and wire on the board, noting connector positions.
- Remove — Unplug the harnesses, release the standoffs/screws, and lift out the old board.
- Install — Seat the new board on its standoffs and reconnect each harness exactly per your photos.
- Test — Restore power, run heating, and verify normal operation and a clean defrost cycle.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts.
- Unit defrosts too often or stays in defrost.
- Reversing valve or outdoor fan not controlled correctly during defrost.
- Visible burnt traces, scorched relays, or no board activity.
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