Johnson Controls T-4000-3139 Plastic Cover obstructed ductwork

obstructed ductwork

it provides the necessary phase shift for split-phase motors to maintain optimal torque and energy efficiency

The zip nut allows for rapid positioning

the SPDT (Single Pole Double Throw) action allows you to toggle power between two different fan speed taps or between a humidifier and a blower

Johnson Controls T-4000-3139 Plastic Cover obstructed ductworkThe Johnson Controls T 4000 3139 is a professional grade horizontal pneumatic thermostat cover designed specifically for the T 4000 Series room thermostats. Engineered for demanding commercial environments, this white plastic cover provides a clean, uniform look for horizontal mounted controllers where a blank faceplate cover is required. As a genuine Johnson Controls replacement part, it ensures a precise fit for single or dual element sensing units