ICP Defrost Control Board for YE048H — Heat Pump | Ships Today
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Overview
This genuine OEM defrost control board (part number 34332101) governs the defrost cycle on the ICP/Heil/Tempstar YE048H heat pump. It monitors the defrost thermostat and outdoor coil temperature, then starts and ends defrost on its timer interval to melt frost and ice from the coil during heating. The board sequences the compressor, reversing valve, and outdoor fan, and brings in auxiliary heat as needed during the cycle. When it fails, the outdoor coil can ice over and block airflow, heating capacity drops, the reversing valve may not switch, or the unit gets stuck in defrost. Living outdoors and exposed to moisture, temperature swings, and voltage surges, the defrost board is a frequent service replacement on aging heat pumps.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP / Heil / Tempstar |
| Control Voltage | 24 VAC |
| Application | Heat Pump Defrost |
| Fit | OEM |
Compatibility
Directly fits the ICP/Heil/Tempstar YE048H heat pump and related Comfortmaker/Heil-built outdoor units that use board 34332101. Confirm the part number printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, verify zero voltage with a multimeter.
- Access — Remove the condenser/control-box service panel.
- Document — Photograph every wire and connector on the board before disconnecting.
- Remove — Unplug connectors, release the standoffs or screws, and lift out the old board.
- Install — Seat the new board on its standoffs and reconnect each connector per your photo, matching defrost-time pin settings.
- Test — Restore power, run a heating call, and confirm normal operation with proper defrost initiation and termination.
Signs You Need a Replacement
- Outdoor coil ices over and the unit never enters or exits defrost.
- Heat pump stays stuck in defrost or rapidly cycles the reversing valve.
- No 24V output to the compressor contactor or fan during a heating call.
- Visible burn marks, corrosion, or a cracked relay on the board.
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