Repair Kit HONEYWELL ST9120C4040 Furnace Control Circuit Board HQ1011179HW.
Components that come in the kit: AZ8-1CH-24DE, T9AS5D12-24, and T9AS5D12-24
Comes with 3 relay components that repair 99% of all control boards. You must know how to solder with a soldering iron and you must know the correct orientation to install the parts. Capacitors and resistors only go one direction so don't install them backwards b/c they will not work.