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This is the genuine OEM defrost control board (part 1173636) for the Tempstar T2H360GKA200 heat pump. The defrost board monitors outdoor coil temperature and run time, then initiates and terminates the defrost cycle to clear frost from the outdoor coil during heating. It coordinates the reversing valve, outdoor fan, compressor, and auxiliary heat. A failed defrost board causes ice build-up on the outdoor coil, no defrost cycles, short cycling, or a unit that won't run at all — making it a critical component for reliable winter heat pump operation.
| Spec | Value |
|---|---|
| OEM Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V AC |
| Application | Heat Pump Outdoor Unit |
Built for the Tempstar T2H360GKA200 heat pump and matching ICP/Heil/Comfortmaker outdoor units specifying part 1173636. Match the board's part number, terminal layout, and defrost-timing pin options to your original before installing.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.