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Designed to maintain precise air-fuel ratios
This 100135275 burner kit is the industry standard for maintaining HVAC system reliability in demanding commercial and residential environments
it requires a minimum pressure differential of 5 PSI to lift the diaphragm and maintain a fully open position
Efficiency Optimized: The 1075 RPM speed is calibrated for maximum SEER efficiency in residential and commercial split systems
Lennox 71W43 Limit Switch 318973-401 Designed to maintain precise air-fuelThe Lennox 71W43 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial furnace assemblies. This OEM Lennox replacement part, also identified as the L140 30F limit control, is engineered to monitor heat exchanger temperatures and interrupt the electrical circuit if internal heat exceeds safe parameters. With a fixed 140F opening temperature and a 110F automatic reset, this switch ensures