Amana-Goodman 0130M00099 Defrost Thermostat

The Amana-Goodman 0130M00099 Defrost Thermostat is a temperature-sensing switch within refrigeration and heat pump units to control the defrost cycle of the outdoor evaporator coil. It monitors coil temperature and opens or closes the electrical circuit to signal the control board when frost conditions require defrost operation. mounted on heat pump systems and air conditioning outdoor condensers, it supports preventing ice buildup that restricts airflow. Within HVAC systems, heat pump assemblies operate as a protective control component that supports efficient coil thawing and stable heating performance in low ambient conditions.