HK42FZ034 Furnace Control Board Fit for Carrier Bryant HK42FZ013, HK42FZ034, CEBD431012-01A, CEPL131012-01, CEBD430438-06A Control Circuit Board. Features: Controls gas valve, ignitor, blower motor, inducer, humidifier and air cleaner. Microprocessor-based, designed for 100% gas shutoff in case of ignition failure. Reverse polarity protection, secondary brownout voltage protection, compatible with a 24 VAC standard thermostat, provides diagnostic LED to aid in troubleshooting. This furnace control circuit board fixed speed furnace control replaces the following Carrier modules: HK42FZ034, HK42FZ013, CEBD431012-01A, CEPL131012-01, CEPL131012-01-I, CEPL13043B-01, AP3936845, CEBD430438-06A. Software for enhanced controls operation in counterflow and downflow furnace applications. Use caution when installing and servicing the furnace to avoid and control electrostatic discharge.