Johnson Controls T-4000-3144 Plastic Cover protecting the heat exchanger and

protecting the heat exchanger and blower assembly from thermal damage

While the fitting itself is designed to handle pressures up to 5

this auto reset furnace limit switch prevents short-cycling and erratic blower operation caused by restricted airflow or failing thermal sensors

What happens if the internal thermal fuse blows

3-inch pitch length

Johnson Controls T-4000-3144 Plastic Cover protecting the heat exchanger andMaintain the integrity and professional finish of your pneumatic control systems with the Johnson Controls T 4000 3144. This high density white plastic thermostat cover is specifically engineered for vertical mounted thermostats, providing a streamlined, tamper resistant solution for commercial HVAC environments. Designed as a direct replacement for the T 4000 series, this model features a concealed design with no thermometer window and no setpoint