Carrier HH18HA435 Limit Switch 323080-701 Designed to manage burner sequencing

Designed to manage burner sequencing and flame supervision

This model serves as the upgraded direct replacement for the McDonnell & Miller 157-R

Precision-calibrated for 3 Ton R410A systems to maintain optimal evaporator heat transfer

1/4" Stem Diameter

This motorized zone valve is high-temperature rated

Carrier HH18HA435 Limit Switch 323080-701 Designed to manage burner sequencingReplace failing thermal components with the Carrier HH18HA435 Limit Switch, a critical safety device engineered for precise temperature monitoring in residential and commercial furnaces. As a veteran grade 100 135F auto limit switch, this component is designed to interrupt the electrical circuit if the plenum temperature exceeds 135F, preventing heat exchanger damage and ensuring system integrity. Once the temperature drops to the 100F reset point,