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This manual reset limit switch is factory-calibrated at a 175°F temperature rating (L175F)
one locking nut
Reliable signal transmission is essential for maintaining proper combustion blower operation and system efficiency throughout the heating cycle
allow the furnace to run with insufficient venting
Johnson Controls T-4000-2146 Plastic Cover This manual reset limit switchThe Johnson Controls T 4000 2146 is a professional grade vertical pneumatic thermostat cover designed for heavy duty commercial and industrial HVACR environments. This beige plastic enclosure is specifically engineered for the Johnson Controls T 4000 series, providing a precise fit for vertical mounting configurations. It features a built in ? F ? C thermometer and a setpoint window, allowing for immediate visual verification of ambient temperature
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