ICP Defrost Control Board for YC036HA — Heat Pump 34332100 | Ships Today
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Overview
This genuine OEM defrost control board (part number 34332100) is the brain that manages the defrost cycle on your ICP Tempstar Heil YC036HA heat pump. During cold-weather operation it monitors the defrost thermostat and a timed interval, then commands the reversing valve and outdoor fan to clear frost buildup from the outdoor coil so the system keeps heating efficiently. A failed board can leave the outdoor coil iced over, lock the unit out of defrost, fail to energize auxiliary/emergency heat, or short-cycle the compressor. Common symptoms include a heavily frosted or iced outdoor coil, no defrost cycle initiating, the reversing valve not switching during defrost, or the unit failing to call for backup heat. The board operates on the 24V control circuit and drives the reversing valve, fan, and heat relays.
Specifications
| Spec | Value |
|---|---|
| Part Number | 34332100 |
| Type | Defrost Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24 VAC |
| Application | Heat Pump Defrost Control |
| Fit | OEM Direct Replacement |
Compatibility
Direct-fit OEM replacement for the ICP Tempstar Heil YC036HA heat pump and other ICP-family outdoor units using this defrost board. Confirm the board's part number and connector layout match your existing control before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
- Access — Remove the control access panel on the condensing unit.
- Document — Photograph every wire and connector on the board, noting terminal positions.
- Remove — Unplug the harnesses, release the board's mounting standoffs or screws, and lift the old board out.
- Install — Seat the new board on the standoffs and reconnect every harness to the matching terminal per your photo.
- Test — Restore power, run a heating call, and verify normal operation and proper defrost initiation.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts
- Reversing valve or fan doesn't respond during defrost
- Auxiliary/emergency heat fails to energize
- Compressor short-cycling or no response to heating call
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