ICP Defrost Control Board for YJ042GA2 — Heat Pump Defrost Timer | Ships Today
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Overview
This OEM defrost control board (Part #1069364) manages the defrost cycle on your ICP YJ042GA2 heat pump. During heating mode, frost accumulates on the outdoor coil and chokes off heat transfer. The defrost board monitors coil temperature and elapsed run time, then commands the unit into a temporary cooling cycle to melt that frost while energizing the auxiliary heat strip. A failed board is one of the most common causes of an iced-over outdoor unit, weak heat output, or a heat pump that runs constantly without recovering temperature. The board operates on a 24V control circuit and coordinates the reversing valve, outdoor fan, and compressor contactor during each timed defrost interval.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1069364 |
| Type | Defrost Control Board |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Control Voltage | 24V |
| Function | Timed / demand defrost |
| Fits Model | YJ042GA2 |
Compatibility
Engineered as the factory replacement for the ICP YJ042GA2 heat pump and shared across the Tempstar, Heil, and Comfortmaker families that use this chassis. Always confirm your existing board's part number against 1069364 before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the outdoor unit's electrical service panel.
- Document — Photograph every wire and terminal on the old board before disconnecting.
- Remove — Label and disconnect the low-voltage and sensor leads, release the mounting standoffs, and lift out the failed board.
- Install — Mount the new board on the standoffs and reconnect each lead exactly as photographed, including the defrost thermostat sensor.
- Test — Restore power and confirm the unit completes a normal heating call and initiates defrost on demand.
Signs You Need a Replacement
- Outdoor coil ices over and never clears in heat mode
- Heat pump runs nonstop with weak or cool air at the registers
- Defrost cycle never initiates or never terminates
- Visible burn marks, corrosion, or relay chatter 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