Constructed with a seamless aluminum housing

Technicians should inspect the filter periodically for visible darkening or debris accumulation

the 117U4126 start relay has likely failed to energize the start capacitor/winding

While this is a common HVAC replacement part

Johnson Controls T-4000-3141 Plastic Cover Constructed with a seamless aluminumThe 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