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This OEM defrost control board (part number 1173636) is the brain of the defrost cycle on your Tempstar T2H360GKA100 heat pump. It monitors outdoor coil temperature and run time, then commands the reversing valve and shuts off the outdoor fan to melt frost from the coil during cold-weather operation. When this board fails, the heat pump can ice over solid, run continuous defrost, or never defrost at all — both conditions kill efficiency and can damage the compressor. The board operates on a 24V control circuit and includes the time/temperature logic, defrost relay, and terminal connections needed to coordinate the unit's heating sequence.
| Spec | Value |
|---|---|
| Part Number | 1173636 |
| Type | Demand / Time-Temperature Defrost Control Board |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V |
| Application | Heat Pump Outdoor Unit |
| Fitment | OEM Direct Replacement |
Designed as a direct OEM replacement for the Tempstar T2H360GKA100 heat pump and shared across many ICP-family condensers built under the Tempstar, Heil, Comfortmaker, and Arcoaire brands that use the 1173636 board. Always confirm your existing board's part number before ordering.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.