Carrier 325878-751 Control Board Furnace

The Carrier 325878-751 Control Board Furnace works by receiving electrical signals sent by thermostats and system sensors to control the ignition of the furnace, heating and shutdown. It operates using integrated circuits and relay routes that regulate the power flow to the components like the inducer gas valve and blower depending on programmed safety logic and timing sequences. The control board fits into the furnace cabinet in the electrical compartment, and is usually mounted on an interior panel where it is connected to wiring harnesses that connect all the major working parts of the heating system to allow centralized system control.