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This genuine OEM defrost control board (part number 34332101) governs the defrost cycle on the ICP/Heil/Tempstar YG024G heat pump. During heating operation the outdoor coil collects frost; this board reads the coil temperature sensor and tracks compressor run time, then periodically commands a defrost to melt that frost and keep the heat pump efficient. It coordinates the reversing valve, the compressor contactor, the outdoor fan, and the defrost timing intervals. When the board fails you may find the outdoor coil fully iced over, a system that never defrosts (or defrosts far too often), missing auxiliary heat staging, or a unit that won't change between heating and cooling. Because this single board controls so many functions, one failure can imitate several separate component faults – making the defrost board a high-value diagnostic and replacement part.
| Spec | Value |
|---|---|
| Part Number | 34332101 |
| Type | Defrost Control Board |
| Brand | ICP / Heil / Tempstar |
| Control Voltage | 24V |
| Function | Defrost timing, reversing valve & fan control |
Direct OEM replacement for the ICP/Heil/Tempstar/Comfortmaker YG024G heat pump and units calling for part 34332101. Confirm the part number and connector layout against your existing board before ordering.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.