GE Refrigerator Evaporator Thermodisc (WR50X10030)

The GE Refrigerator Evaporator Thermodisc is a safety device mounted near the evaporator coils that monitors temperature and cuts power to the defrost heater when the coils reach the correct temperature during the defrost cycle. It acts as a thermal cutoff switch, protecting the refrigerator's cooling system from overheating and ensuring the defrost cycle ends at the right time to prevent damage to surrounding components.

The GE Refrigerator Evaporator Thermodisc can fail due to repeated thermal stress over time, corrosion on the contacts, or a single overheating event that causes it to trip permanently and stop conducting. When this part fails, the defrost cycle may not complete properly, leading to frost buildup on the evaporator coils that blocks airflow and reduces the refrigerator's ability to cool.

These symptoms can help you decide if a faulty evaporator thermodisc matches your problem:

- Frost or ice buildup on the back wall or evaporator coils inside the freezer

- Refrigerator or freezer not cooling as well as it used to

- Fan running but little to no cold air circulating

- Defrost cycle not running or completing correctly

- Food spoiling faster than normal despite normal settings

- Visible ice blockage behind the freezer back panel