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

drop-in replacement for legacy part numbers 626469 and 626469R

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

This specific part is an automatic reset limit switch

Constructed with a seamless aluminum housing

Johnson Controls T-4000-3141 Plastic Cover the 117U4126 start relay hasThe 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