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The Goodman 0130M00105 Defrost Thermostat is the genuine OEM temperature-sensing switch for the ANZ130301AC Amana/Goodman heat pump. Clamped to the outdoor coil tubing, this bi-metal thermostat signals the defrost control board when coil temperature drops low enough to indicate frost or ice buildup. When it fails, the unit either skips defrost — icing the coil and killing heating capacity — or defrosts too often, wasting energy and cutting comfort.
The OEM 0130M00105 is calibrated to the exact close/open temperature setpoints the ANZ130301AC's defrost logic expects. Generic thermostats with different trip points can cause premature or missed defrost cycles even when they physically fit. Choose the genuine sensor for correct defrost timing and reliable winter heating.
Easy to Intermediate — disconnect power, unclip the old sensor, transfer the two wire leads, and clamp the new thermostat to the same tube location. No refrigerant handling required, but correct placement on the coil is important for accurate sensing.