Carrier HH12ZB180 Limit Switch Why is the 90-degree boot

Why is the 90-degree boot important

maintaining a consistent internal diameter for precise pressure signal transmission

Its open construction and energy-limiting design ensure it manages momentary short circuits effectively

Can I bypass the S1-025-27747-018 for testing

Carrier HH12ZB180 Limit Switch Why is the 90-degree bootThe Carrier HH12ZB180 Limit Switch is a critical OEM furnace safety control designed to protect the heat exchanger and burner assembly in Carrier, Bryant, and Payne gas furnaces. This 3 inch insert limit switch features an automatic reset mechanism and is calibrated for a fixed 180 degree Fahrenheit opening temperature with a 40 degree differential (L180 40). High limit switches are standard components in forced air systems, functioning as a normally