Description
The Lennox 91J88 is an ICM Control Board, Measuring 6.65” x 4.3” x 1.75” is the central processing unit of certain Lennox HVAC systems, probably oil-fired furnaces. This small printed circuit board controls several essentialoperations. It receives signals of the thermostat and directs other components of the furnace to act according to the signals received. Some of the functions that are controlled include ignition, fuel deli, and blower among others. Through control of these vital processes, the control board guarantees smooth operation of the furnaces to provide heat throughout a home. It is designed to handle the ordinary heat and electrical load in the furnace.
