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The Goodman 0130M00105 Defrost Thermostat is a genuine OEM temperature sensor for the ANZ130421AE heat pump. Clipped to the outdoor coil, this thermostat senses coil temperature and signals the defrost control board when frost accumulation reaches the point that airflow and heating capacity begin to drop. Accurate defrost timing is what keeps a heat pump heating efficiently in cold, damp weather — a failed sensor causes either coil icing or wasteful over-defrosting.
The 0130M00105 is calibrated to the specific close-on and open-on temperatures the ANZ130421AE defrost board expects. Generic sensors with different trip points can start defrost too early (wasting energy) or too late (allowing damaging ice buildup). OEM calibration ensures the board and sensor work as a matched pair.
Easy to Intermediate. Disconnect power, unclip the old sensor from the coil, unplug its harness connector, and clip the new one to the same tube location. Ensure firm metal-to-metal contact for accurate readings. No refrigerant work required.
Genuine Goodman replacement. For fitment help, contact info@nationalhvacparts.com.