This is a gas range. I noticed when I turned on a tap there was a clicking sound and noted a spark at all of the top burners, thus lighting whichever tap getting the gas. When I turned on one particular tap there was no sound or spark, thus it would not light. I then removed the panel behind the knobs and discovered a switch like device attached to each valve stem, and figured for some reason this ignitor thing wasn’t making an electrical contact. Went online, located the part at AppliancePartsPros.com placed the order. Well, after day 2 the door bell rings and their stands the UPS driver with an envelope. An hour or so later that problem tap was working like the others. Thank you AppliancePartsPros, you got me back in business.