ICP Defrost Control Board for YJ024G2 — Heat Pump OEM | Ships Today
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Overview
This OEM defrost control board (part number 34332101) manages the defrost cycle on your ICP YJ024G2 heat pump. During heating operation, ice accumulates on the outdoor coil; the board reads the coil temperature sensor and elapsed run time, then triggers a timed defrost cycle to melt that ice and restore heating efficiency. It sequences the reversing valve, compressor, outdoor fan, and auxiliary heat, and manages all 24V control timing for the routine. A failed board is a leading cause of poor heat-pump performance — when it stops working, the coil ices over and stays frozen, heating output collapses, the unit may short cycle, or it can lock into a continuous defrost. Replacing the board restores correct, automatic defrost timing.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP (Tempstar / Heil) |
| Control Voltage | 24V |
| Application | Heat Pump Outdoor Unit |
| Fits Model | YJ024G2 |
Compatibility
Designed as a direct OEM replacement for the ICP / Tempstar / Heil YJ024G2 heat pump. The same defrost board services many comparable ICP-family and Comfortmaker heat-pump condensing units of the same generation. Confirm the original part number 34332101 and the terminal layout against your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage at the board with a multimeter.
- Access — Remove the condensing unit service panel to reach the control box.
- Document — Photograph every wire and connector, including the coil sensor and reversing valve leads, before disconnecting.
- Remove — Unplug the harnesses, release the standoffs or screws, and lift the old board out.
- Install — Mount the new board, reconnect each harness and sensor exactly as photographed, and match any defrost-time jumper to the original setting.
- Test — Restore power and run a heating cycle; confirm normal operation and initiate a forced defrost to verify the cycle completes and clears.
Signs You Need a Replacement
- Outdoor coil ices over and never clears in heating mode.
- Weak or no heat output in cold weather.
- Unit short cycles or gets stuck in continuous defrost.
- Reversing valve or auxiliary heat fails to engage on schedule.
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