ICP Defrost Control Board for YJ030G2 — Heat Pump | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This genuine OEM defrost control board (part #34332101) manages the defrost cycle on the ICP / Tempstar / Heil YJ030G2 heat pump. The board monitors the defrost thermostat and timer, energizes the reversing valve, and switches off the condenser fan to melt frost from the outdoor coil during cold-weather operation. A failed defrost board leaves the outdoor coil iced over, kills heating efficiency, and can trip the system on high head pressure. Common failure symptoms include a heat pump that ices up and never defrosts, a defrost cycle that runs continuously, no compressor or fan response, or visible scorch marks and failed relays on the board.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Application | Heat Pump Defrost |
| Fitment | OEM Exact Replacement |
Compatibility
Exact-fit OEM replacement for the ICP / Tempstar / Heil YJ030G2 heat pump and other ICP-family heat pumps using this defrost board. Match the board part number, relay layout, and connector pinout to your existing 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 expose the control board.
- Document — Photograph every wire harness and connector position before disconnecting.
- Remove — Unplug the connectors, release the board standoffs or screws, and lift out the old board.
- Install — Seat the new board on the standoffs and reconnect each harness per your photo.
- Test — Restore power and confirm a normal heating call and that a forced defrost cycle initiates correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never clears
- Defrost cycle runs constantly or not at all
- No compressor or fan output from the board
- Burnt traces, failed relays, or scorch marks 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