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Verify 120V across the terminals using a multimeter
It features two setpoint windows
When should this part be replaced
reducing site time for technicians
This switch manages blower fan timing based on heat exchanger temperature
Johnson Controls T-4000-3141 Plastic Cover Verify 120V across the terminalsThe Johnson Controls T 4000 3141 is a commercial grade pneumatic thermostat cover designed for horizontal mounting configurations within HVAC control systems. Engineered for T 4000 series thermostats, this white plastic enclosure features a single setpoint window to allow for clear visibility of calibration without compromising the protection of the internal bimetal sensing elements. The unit is designed with a clean, low profile aesthetic featuring