ICP Defrost Control Board for YG030GC1 — Heat Pump Timer | Ships Today
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Overview
This OEM defrost control board (part number 34332101) is the brain of the defrost cycle on your ICP YG030GC1 heat pump. In heating mode the outdoor coil collects frost, and this board monitors run time and coil temperature to periodically reverse the system into defrost, clearing ice so the unit keeps heating efficiently. It also coordinates the reversing valve, fan, and auxiliary heat during the cycle. When the board fails, the outdoor coil ices over, heating output drops, the unit may short-cycle, or it never enters or never exits defrost. Replacing the board restores proper defrost timing and protects efficiency and the compressor.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24 VAC |
| Function | Heat Pump Defrost Timing & Sequencing |
| Application | Heat Pump Outdoor Unit |
Compatibility
Direct OEM replacement for the ICP / Tempstar / Heil YG030GC1 heat pump and shared across ICP-family outdoor units that use defrost board 34332101. Verify the printed part number and connector layout against your original board before installing.
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 connector, plug, and wire on the existing board before unplugging.
- Remove — Unplug the wire harnesses, release the board standoffs or screws, and lift out the old board.
- Install — Mount the new board, then reconnect each harness and sensor lead exactly per your photos, including the defrost sensor.
- Test — Restore power, run a heating cycle, and confirm normal operation; initiate a forced defrost if your board supports the test pins.
Signs You Need a Replacement
- Outdoor coil freezes over and won't defrost
- Unit stuck running in defrost or never entering defrost
- Weak heating output or frequent short-cycling in heat mode
- Reversing valve or outdoor fan not sequencing correctly
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. 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