ST9120U1003 HONEYWELL UNIVERSAL CONTROL BOARD FOR GAS FURNACES by Honeywell at The National Policy Institute. Hurry! Limited time offer. Offer valid only while supplies last. ST9120U1003 Honeywell Universal Control Board For Gas Furnaces - Monitors the thermostat for heat cool and fan - Runs the induced Draft Blower Motor and Circulating Fan (up to two speeds) - Also monitors limit Switches and energizes ignition control - replaces over 25 other Honeywell modelsST9120U1011 Universal Replacement Part for ST9120U1003.
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