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The Goodman 0130M00105 is a genuine OEM defrost thermostat (coil temperature sensor) built for the ASZ130301AC 13 SEER, 2.5-ton (30,000 BTU) heat pump and compatible Goodman/Amana outdoor units. Clamped to the outdoor coil, this bimetal thermostat senses coil temperature and signals the defrost board to initiate and terminate the defrost cycle — clearing frost buildup so the heat pump maintains efficient heating in cold weather. A faulty defrost thermostat causes iced-over coils, poor heat output, or defrost cycles that run too long or not at all.
The OEM Goodman thermostat is calibrated to the exact open/close temperature setpoints the ASZ130301AC's defrost board expects. Generic sensors with different trip points can trigger nuisance defrosts (wasting energy) or fail to defrost, allowing damaging ice buildup. For a temperature-critical sensor, OEM calibration is worth it.
Easy (2/5). Disconnect power, unclip the sensor from the coil, transfer the wiring connector, and clamp the new thermostat to the same return bend. Ensure firm metal-to-metal contact for accurate readings.
Always disconnect power before servicing HVAC equipment.