ICP Defrost Control Board for YG048GC — Heat Pump Timed/Demand Defrost | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This OEM defrost control board (ICP part number 34332101) is the brain of the defrost cycle on your ICP/Tempstar/Heil YG048GC heat pump. It monitors coil temperature and run time, then initiates and terminates the defrost cycle to clear frost from the outdoor coil during heating operation. The board energizes the reversing valve, controls the compressor and outdoor fan, and signals the indoor unit for auxiliary heat. A failed defrost board is one of the most common causes of a heat pump that ices over, blows cold air in heating mode, or fails to defrost. The board operates on a 24V control signal and includes defrost timing and temperature-sensor inputs.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP (Tempstar / Heil) |
| Control Voltage | 24V |
| Application | Heat Pump Defrost |
| Fitment | OEM Replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil YG048GC heat pump and other ICP-family condensing units that originally shipped with board 34332101. Always confirm the part number printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
- Access — Remove the outdoor unit's control-box service panel.
- Document — Photograph every wire and terminal location before disconnecting anything.
- Remove — Label and unplug the low-voltage and sensor connectors, then unscrew the old defrost board from its standoffs.
- Install — Mount the new board on the standoffs and reconnect every wire exactly as photographed, including the coil temperature sensor.
- Test — Restore power and run a heating/defrost cycle to confirm the board initiates and terminates defrost correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts
- Heat pump blows cold air in heating mode
- Reversing valve or aux heat fails to energize during defrost
- Visible burn marks, corrosion, or a non-responsive 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