Description
The Reznor RZ085449 A/R Limit Switch 36T21 is an automatic reset temperature safety control used in HVAC heating equipment to monitor internal heat conditions. It is installed in compatible unit heaters, where it responds to excessive temperature rise within the heat exchanger or airflow path by opening or closing an electrical circuit to protect the system during operation. The switch is mounted inside the burner or air handling section and operates as part of the safety control chain alongside the blower motor, ignition system, and main control board.
