Carrier HH680502 Limit Switch 320734-701 000 Ohms at 77

000 Ohms at 77

Common Questions & Technical Insights Is the ST-W24 compatible with non-Johnson Controls controllers

A common indicator is the system being stuck in either heating or cooling mode

leak-proof installation in tight mechanical spaces

using a genuine International Environmental part ensures exact electrical characteristics and mechanical alignment for optimal system efficiency and reduced downtime

Carrier HH680502 Limit Switch 320734-701 000 Ohms at 77The Carrier HH680502 Limit Switch is a critical safety component designed for precise thermal monitoring in residential and commercial furnaces. This 90 120F auto reset limit switch functions as a primary high limit control, specifically engineered to open the electrical circuit if internal plenum temperatures exceed the 120F threshold. Once the heat exchanger cools to the 90F reset point, the switch automatically closes, restoring system operation.