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Common Service Questions What causes this limit switch to trip frequently
requiring a replacement Lennox limit switch
Can I use this 440V capacitor if my old one was rated for 370V
metallic particles
Reliable Signaling: The 1 N/O (Normally Open) contact configuration provides a clean circuit closure for system feedback and secondary load control
System Sensor ST-5 Sampling Tube Common Service Questions What causesThe System Sensor ST 5 is a 5 foot metal sampling tube engineered for high performance smoke detection in HVAC ducts ranging from 4 to 8 feet in width. Built with a durable rigid steel construction, this tube is essential for contractors installing or maintaining duct smoke detectors in commercial and industrial air handling systems. The ST 5 acts as the direct replacement for L 313 1, ensuring seamless integration into legacy systems without the need