Tempstar Defrost Control Board for T2H330GKD100 — Heat Pump OEM Board | Ships Today
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Overview
This is the genuine OEM defrost control board (Part No. 1173636) for the Tempstar T2H330GKD100 heat pump. The defrost board is the brain of the outdoor unit during heating season — it monitors the outdoor coil temperature and accumulated run time, then commands a defrost cycle to melt frost off the coil. During defrost it reverses the refrigerant flow via the reversing valve, shuts off the outdoor fan, and energizes auxiliary heat so the home stays comfortable. A failed board leaves the unit unable to defrost (coil ices over) or stuck in a cycle, causing poor heating, short cycling, or a completely dead outdoor unit.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Description | Defrost Control Board |
| Type | Heat Pump Defrost Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Fitment | OEM Replacement |
Compatibility
Factory-correct replacement for the Tempstar T2H330GKD100 heat pump and matching ICP-family outdoor units built under the Heil, Comfortmaker, Arcoaire and Keeprite labels that use this defrost board platform. Match the OEM part number on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker. Verify zero voltage with a multimeter before handling the board.
- Access — Remove the condenser electrical access panel.
- Document — Photograph every wire, plug and the defrost timing jumper position before disconnecting.
- Remove — Disconnect the wire harnesses and unscrew/unclip the old board from its standoffs.
- Install — Mount the new board, transfer the defrost timing pin to the same setting, and reconnect every harness per your photo.
- Test — Restore power, run a heating cycle, and verify the unit initiates and terminates a defrost cycle correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never defrosts in heating mode
- Unit short cycles or gets stuck in continuous defrost
- No auxiliary/emergency heat staging during defrost
- Dead outdoor unit with 24V present at 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