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The Goodman 0130M00105 Defrost Thermostat is a genuine OEM replacement sensor for the ASZ130241AH 13 SEER, 2‑ton (24,000 BTU) heat pump. Mounted to the outdoor coil, this thermostat senses coil temperature and signals the defrost control board to initiate and terminate the defrost cycle—preventing ice buildup that robs your heat pump of heating capacity in cold weather.
OEM vs. Generic: This is a factory Goodman part built to the exact set-point tolerances of the ASZ13 defrost logic. Generic universal defrost thermostats often use different open/close temperatures, which can cause short-cycling or a coil that never fully clears ice. Choose OEM when precise defrost timing matters.
Install difficulty: Easy (1/5). Disconnect power, unclip the old sensor, transfer the wiring connector, and re-clip. Basic hand tools only; typically a 10-minute repair for a qualified technician.