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The Goodman 0130M00105 Defrost Thermostat is a genuine OEM coil-mounted temperature switch for the ANZ130301AB heat pump. Clipped to the outdoor coil tubing, it senses coil temperature and signals the defrost control board to start and terminate the defrost cycle — clearing frost buildup in winter so the heat pump keeps delivering efficient heat.
The defrost thermostat's close and open set-points are calibrated to Goodman's coil design. The genuine 0130M00105 uses the exact temperature thresholds the ANZ130301AB defrost logic expects. A generic switch with different set-points can cause the unit to skip defrosts (icing the coil) or defrost too often (wasting energy and stressing the reversing valve). OEM keeps the defrost cycle accurate.
Easy (2/5). With power off, unclip the old thermostat from the coil, transfer the two wire spade connectors, and clip the new sensor to the same tube location for good thermal contact. No refrigerant work required — most technicians finish in minutes.
Restore reliable winter defrost operation to your ANZ130301AB heat pump.