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ensuring a drop-in fit for Revision H and R models
What shaft size is compatible with the AM-113 crank arm
Technicians typically observe "clicks" without ignition
optimizing HVAC energy efficiency
Lennox 17W56 Transformer Els PW 17895 ensuring a drop-in fit forThe Lennox 17W56 transformer, also identified as model LB 111888A, is a heavy duty Class 2 transformer engineered for precision voltage step down in residential and commercial HVAC systems. This 40VA control transformer features a primary input of 120V AC at 60Hz and a stabilized 24V AC secondary output, making it the standard HVAC 24V power supply for critical components such as furnace control boards, 24 volt contactors, and digital thermostats.