Modine 5H0730570006 Blocked Vent Switch 330°

The Modine 5H0730570006 Blocked Vent Switch is a temperature-sensitive safety control used to monitor venting conditions in HVAC systems. Rated to respond at 330F it detects excessive heat caused by restricted or blocked flue passages in gas-fired equipment such as unit heaters and furnaces. When abnormal conditions occur the switch interrupts the control circuit to shut down the burner reducing the risk of overheating and backflow. Installed within the venting or flue path it plays an essential role in maintaining proper airflow, and protecting system components during operation.