ICP Defrost Control Board for YJ042GB1 — Heat Pump Timer Board | Ships Today
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Overview
This genuine OEM defrost control board (part number 1069364) is the brain of the ICP Tempstar Heil YJ042GB1 heat pump's defrost cycle. In heating mode the board monitors the coil temperature sensor and run time, then initiates a defrost cycle to melt frost off the outdoor coil by reversing the system and energizing the reversing valve while pausing the outdoor fan. A failed defrost board leads to a heavily iced outdoor coil, poor heating performance, a unit stuck in defrost, or a heat pump that never defrosts at all. Replacing the board restores proper, automatic defrost timing and protects the compressor.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1069364 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Function | Heat pump defrost timing & reversing valve control |
Compatibility
Factory replacement defrost board for the ICP/Tempstar/Heil YJ042GB1 heat pump and related models in the same outdoor unit family. Match the board layout, connector positions, and part number to your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
- Access — Remove the condensing unit's electrical service panel.
- Document — Photograph every connector and wire on the existing board before disconnecting.
- Remove — Unplug each harness, release the standoffs or screws, and lift out the old board.
- Install — Seat the new board on its standoffs and reconnect each harness to match your photo.
- Test — Restore power and confirm normal heating operation and a proper defrost cycle.
Signs You Need a Replacement
- Outdoor coil ices over heavily in heating mode
- Heat pump stuck in defrost or never enters defrost
- Weak heating output or frequent auxiliary heat use
- No response from the board's defrost LED or test pins
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