The Protech 47-102685-87 Furnace Control Board Kit is a genuine OEM Rheem / Ruud replacement board. Microprocessor-based precision. Controls inducer and blower fan motors, hot surface ignitor, and gas valve Monitors timing, trial for ignition, flame sensing, pressure and limit switches, and lockout. Designed for 100% gas shutoff in case of ignition failure Reverse polarity protection Compatible with 24 VAC standard thermostat.