The Lennox 27J29 Limit Switch is a critical safety component designed for precise thermal regulation in residential and light commercial HVAC systems

A common symptom is the furnace blower running continuously while the burners fail to ignite

providing ample lead for mounting the LWCO control box

Sanitation Compliance: NSF certification guarantees the materials and design are safe for use in food processing and storage

the SEN0355 is designed to withstand the intense thermal environment of the burner box without signal degradation

Raytek MT4 IR Thermometer Els PW 17895 The Lennox 27J29 Limit SwitchAs a field tested non contact infrared thermometer, the Raytek MT4 is a staple in the HVAC technician's diagnostic kit. Engineered for immediate data acquisition, this IR temperature gun operates across a wide range from 0F to 750F ( 18C to 400C), allowing for safe monitoring of evaporator coils, compressor discharge lines, and electrical busbars. With an 8: 1 distance to spot ratio, it provides precise HVAC troubleshooting capabilities without