ICP Defrost Control Board for YE036H Heat Pump — 24V OEM | Ships Today
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Overview
The ICP 34332101 Defrost Control Board is the OEM electronic timing and logic board that manages the defrost cycle on the YE036H heat pump. It monitors coil temperature and accumulated run time, then commands the reversing valve and outdoor fan to clear frost from the outdoor coil during cold-weather operation. Operating on a 24V control signal, this board coordinates compressor, fan, and auxiliary heat staging so the system defrosts efficiently without short-cycling. When this board fails, the heat pump may ice over, run continuously in defrost, or never initiate defrost at all — leaving the outdoor coil buried in frost and starving the system of capacity. Installing the correct OEM board restores reliable, factory-spec defrost timing.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP |
| Control Voltage | 24V |
| Application | Heat Pump Defrost |
| Fitment | OEM |
Compatibility
Engineered as the direct OEM replacement for the ICP / Tempstar / Heil YE036H heat pump. Also commonly shared across related ICP-family condensing units that use the 34332101 defrost board. Always confirm against your existing board part number before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any terminals.
- Access — Remove the outdoor unit service panel to expose the control compartment.
- Document — Photograph every wire and terminal connection on the old board before disconnecting anything.
- Remove — Label and disconnect each low-voltage and line-voltage lead, then unsnap or unscrew the failed board from its standoffs.
- Install — Mount the new 34332101 board on the standoffs and reconnect each wire exactly per your photo.
- Test — Restore power, initiate a defrost cycle, and confirm the reversing valve, fan, and timing operate correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts
- Unit stuck in continuous defrost or short-cycling
- No 24V output to reversing valve or fan during defrost
- Visible burn marks, corrosion, or a cracked relay on the board
Shipping & Returns
Ships same day on orders placed 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