ICP Defrost Control Board for YG042GA2 — Heat Pump Board | Ships Today
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Overview
This OEM defrost control board (ICP part number 1069364) manages the defrost cycle on your ICP / Heil / Tempstar YG042GA2 heat pump. During winter operation, frost builds on the outdoor coil and chokes off heat transfer. The defrost board monitors the defrost thermostat and run-time timer, then commands the reversing valve into cooling mode, shuts off the outdoor fan, and energizes auxiliary heat to melt the ice — before returning the system to heating. A failed defrost board leaves the outdoor coil iced over, kills heating capacity, and can trip the compressor on high pressure.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1069364 |
| Description | Defrost Control Board |
| Type | Defrost Timer / Control Board |
| Brand | ICP / Heil / Tempstar |
| Application | Heat Pump Defrost Control |
| Control Voltage | 24V |
Compatibility
Direct OEM-fit replacement for the ICP / Heil / Tempstar YG042GA2 heat pump. The 1069364 defrost board is used across multiple ICP-family heat pumps; verify the connector layout and timer pin selection match your existing board before installing, and set the defrost interval jumper to the original setting.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
- Access — Remove the unit's control/electrical access panel.
- Document — Photograph every plug, wire, and the defrost-time jumper position before disconnecting.
- Remove — Unplug the harness connectors, remove the board's mounting screws or standoffs, and lift the old board out.
- Install — Mount the new board, set the defrost-time jumper to match the original, and reconnect all connectors per your photo.
- Test — Restore power and initiate a forced defrost (per the board's test pins) to confirm the reversing valve, outdoor fan, and aux heat respond correctly.
Signs You Need a Replacement
- Outdoor coil stays caked in ice during heating mode.
- Heat pump never enters or never exits a defrost cycle.
- Weak or no heat output in cold weather.
- No response from the board's defrost test/initiate 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