This high-limit safety control is a direct drop-in replacement for failed or drifting thermal switches in residential and light commercial HVAC equipment

What are the symptoms of a failed isolator

Broad Temperature Range: Operates reliably between 110°F and 170°F for versatile application in various heating profiles

minimizing contact pitting and ensuring long-term circuit stability

Designed for 115V applications

Belimo KH-AFB Crankarm This high-limit safety control isThe Belimo KH AFB Crankarm is a heavy duty linkage accessory specifically engineered for high torque AFB and NFB series actuators. Designed for non direct coupled mounting applications, this actuator crank arm provides a secure mechanical connection to 3 4 inch damper shafts, accommodating round spindles with a clamping range of 10 to 22 mm. Constructed from durable galvanized steel and zinc die cast materials, it ensures precise torque transfer and