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The Goodman 0130M00105 is a genuine OEM defrost thermostat designed for the ASZ130361AD 3-ton heat pump. Clamped to the outdoor coil tubing, this temperature-sensing switch tells the defrost control board when the coil is cold enough to accumulate frost, initiating the defrost cycle so the unit keeps heating efficiently through winter.
A failed defrost thermostat is one of the most common causes of a heat pump icing over, short-cycling, or losing heating capacity in cold weather. Replacing this inexpensive sensor often restores full performance without a costly board or compressor diagnosis.
Generic snap discs may open and close at incorrect temperatures, causing over- or under-frequent defrost cycles that waste energy and stress the reversing valve. The OEM 0130M00105 is calibrated to Goodman's exact defrost logic for the ASZ13 platform, ensuring the board sees the correct trip points.
Easy (2/5). Disconnect power, unclip the old sensor from the coil, transfer the wire connections, and clip the new thermostat to the same tube location. About 15 minutes with basic hand tools; ensure firm metal-to-metal contact for accurate sensing.