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The Goodman 0130M00105 Defrost Thermostat is a genuine OEM temperature-sensing switch designed for the ASZ130241AD 2-ton 13 SEER heat pump. Clamped to the outdoor coil, this thermostat monitors coil temperature and signals the defrost control board to initiate and terminate defrost cycles. When it fails, the outdoor coil can ice over in heating mode — killing efficiency and heating capacity — or the unit may run unnecessary defrost cycles that waste energy.
OEM vs. Generic: This factory Goodman thermostat is calibrated to the precise open/close set points the ASZ13 defrost board expects. Generic snap-disc switches often have different trip temperatures, causing premature or delayed defrost and coil icing. OEM ensures the defrost logic behaves exactly as engineered.
Install difficulty: Easy to Moderate (2/5). Disconnect power, remove the service panel, unclip the old thermostat from the coil tube, transfer the wire leads, and clamp the new sensor firmly to the same tube location for accurate readings. No refrigerant or brazing required — usually a 15–20 minute repair for a comfortable DIYer.
Confirm your model and serial number before ordering. Genuine Goodman quality for dependable cold-weather heat pump operation.