Johnson Controls T-4000-2139 Cover protecting the electrical motor and

protecting the electrical motor and surrounding components

Rugged Construction: Built with a heavy-duty steel frame and a ladder hook for convenient storage while working at heights

shutting down the burner or heating element

the HH18HA490 is the official updated replacement part designed to meet or exceed the specifications of the HH18HA292

Johnson Controls T-4000-2139 Cover protecting the electrical motor andThe 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