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The ICP defrost control board (OEM part 34330100) governs the defrost cycle on the YD060GA heat pump. It reads outdoor coil temperature and accumulated run time to decide when to initiate defrost, then energizes the reversing valve, shuts off the outdoor fan, and brings on auxiliary heat so the indoor air stays warm while frost melts off the coil. Running on 24V control voltage, it also provides compressor anti-short-cycle timing. A failed board commonly shows up as a coil that ices solid and never clears, a unit stuck in or skipping defrost, no aux heat, or a compressor that won't energize. Swapping in a new board restores correct automatic defrost.
| Spec | Value |
|---|---|
| Part Number | 34330100 |
| Type | Defrost Control Board |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Control Voltage | 24V |
| Function | Timed/demand defrost, reversing valve, aux heat relay |
| Application | Heat pump outdoor unit |
OEM replacement for ICP heat pump model YD060GA and the equivalent Tempstar, Heil, and Comfortmaker outdoor units that use defrost control board 34330100. Verify the part number on your current board before ordering.
Ships same day before 3 PM CST. 30-day returns. National HVAC Parts fitment guarantee.