Choose Options Compare Quick view RZ110851 110851 - fits OEM Reznor Furnace Pilot Assembly As low as $141.95 Reznor Furnace Pilot Assembly RZ110851 110851 This is a BRAND NEW Reznor Furnace Pilot Assembly. It replaces the old part numbers listed below. Function: The purpose of an ignitor is to ignite the gas after the gas valve opens up. ... As low as $141.95 Choose Options Compare Quick view