Tempstar Defrost Control Board for T2H330GKA200 — Heat Pump OEM | Ships Today
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Overview
This is a genuine OEM defrost control board (part number 1173636) for the Tempstar T2H330GKA200 heat pump. The defrost board is the brain of the outdoor unit during heating season — it monitors the coil temperature sensor and elapsed run time, then initiates a defrost cycle to melt frost off the outdoor coil. During defrost it commands the reversing valve, shuts off the condenser fan, and can energize auxiliary heat to keep supply air comfortable. A failed board leads to a frozen-over outdoor coil, poor heating performance, a unit that never defrosts (or defrosts constantly), or a heat pump that won't switch between heating and cooling. Replacing it restores correct defrost timing and full heat-pump efficiency.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24 VAC |
| Function | Defrost timing, reversing valve and fan control |
Compatibility
Designed as the factory replacement for the Tempstar T2H330GKA200 heat pump. The 1173636 defrost board is shared across numerous ICP-family heat pumps marketed as Tempstar, Heil, Comfortmaker, and Arcoaire. Match your old board's part number and connector layout before installing.
Installation Guide
- Safety First — Disconnect power at the 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 plug, wire, and the defrost-time jumper setting before disconnecting.
- Remove — Unplug each harness, release the standoffs or screws, and lift out the old board.
- Install — Mount the new board, reconnect every harness per your photos, and set the defrost-time selector to match the original.
- Test — Restore power, run a heating cycle, and confirm normal operation and that a forced defrost behaves correctly.
Signs You Need a Replacement
- Outdoor coil ices over and never clears
- Heat pump won't switch between heating and cooling modes
- Unit defrosts too often or stays stuck in defrost
- No output to the reversing valve or condenser fan during defrost
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