Johnson Controls T-4000-2139 Cover shutting down the burner or

shutting down the burner or heating element

Unlike fixed-head combs

this part is used across several brands including Heil

protecting the electrical motor and surrounding components

The lead length provides ample slack for proper routing around copper lines and internal components

Johnson Controls T-4000-2139 Cover shutting down the burner orThe Johnson Controls T 4000 2139 is a professional grade horizontal thermostat cover designed specifically for the T 4000 Series pneumatic room thermostats. Engineered for sleek, unobtrusive installation, this beige plastic cover features a clean aluminum faceplate without a thermometer window or setpoint adjustment openings. This configuration is ideal for facilities where unauthorized tampering must be minimized while maintaining a uniform aesthetic