040-422

This 90-100F limit switch is a critical safety and regulation component designed for residential HVAC systems, furnaces, and heating appliances. As a fan disc high-limit control, it monitors internal temperatures to ensure the blower fan operates correctly and prevents the system from overheating. When the ambient temperature reaches the designated 90-100 degree Fahrenheit range, the bimetal disc triggers a snap-action response to open or close the electrical circuit. Replacing a worn or malfunctioning thermal switch is essential for maintaining furnace efficiency, protecting internal components from heat damage, and ensuring consistent home climate control.
Type: Fan Disc High Limit Control Switch
Size: Small
Application: Commonly used in furnaces, electric heaters, and central heating units to regulate blower fan activation and provide high-limit thermal protection.
Specifications: Operating temperature range: 90-100°F; Snap-action bimetal disc mechanism; High-limit safety cut-out functionality.