Whether you are performing a professional HVAC repair or a system upgrade

High-Output Performance: Delivers a consistent 25–35 mV open circuit range to ensure reliable flame detection and valve operation

Technicians can rely on the 2VP series for heavy-duty service up to 25HP

A tripped or faulty limit switch will typically cause the indoor blower to run continuously while preventing the burners from igniting or staying lit

Lennox 77N39 Detector 319847-401 Whether you are performing aFor high traffic commercial environments and sensitive mechanical rooms, the Lennox 77N39 CO2 Detector (T8100 D LN) provides contractors with a heavy duty solution for real time indoor air quality monitoring. This wall mount carbon dioxide sensor utilizes advanced non dispersive infrared (NDIR) technology and gold plated optics to ensure long term stability and precision. Designed for seamless integration, it communicates directly with the Lennox