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This is the genuine OEM defrost control board for the Tempstar T4H560GKB100 heat pump. The defrost board monitors outdoor coil temperature and run time, then commands the reversing valve and a fan shutdown to melt frost from the outdoor coil during heating season. When the board fails, the unit may ice over, run inefficiently, short-cycle, or stop heating entirely. Replacing it with the correct OEM defrost board (1173636) restores proper defrost timing and heat pump performance.
| Spec | Value |
|---|---|
| OEM Part Number | 1173636 |
| Type | Defrost Control Board |
| Brand | Tempstar |
| Control Voltage | 24V |
| Function | Defrost timing & reversing valve control |
| Fits Model | T4H560GKB100 |
| Fit | OEM Direct Replacement |
Direct-fit replacement for the Tempstar T4H560GKB100 heat pump and equivalent ICP / Heil / Comfortmaker units using this defrost control board. Match the OEM number 1173636 and connector layout to your existing board before ordering.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.