040-688

This Limit Switch Assembly is a vital safety component engineered for gas furnaces and residential HVAC systems. Functioning as a high limit control switch, it monitors the temperature within the furnace cabinet to prevent overheating. If internal temperatures reach a dangerous threshold—often caused by issues like a malfunctioning blower motor or a clogged air filter—this fan disc switch automatically shuts down the burners to ensure safe operation. Replacing a faulty limit switch is essential for maintaining the longevity of your heating system and ensuring home safety. This durable thermal cutout is designed for reliable performance and precision temperature sensing in modern central heating equipment.
Type: High Limit Control Switch
Size: Small
Application: Designed for use in residential gas furnaces and high-efficiency HVAC units to regulate internal heat exchanger temperatures and provide emergency safety shut-off.
Specifications: Thermal disc sensing technology, fixed temperature safety cutout, automatic reset functionality, heat-resistant housing.