Steve B San Diego , CA September 19, 2014 Broken air conditioner knobs i saved hundreds of dollars My older Hampton Bay window air conditioner still runs great, but the plastic knobs had become brittle and broken. I looked at getting a new unit, but thought I might try to search for replacement knobs online. I knew it would be difficult because my AC unit is so old. I looked through half a dozen web sites and was about to give up when I found AppliancePartsPros.com. I was able to identify an exact match for my knobs, and now my unit is running again! One thing I especially loved is that the photos of the products are taken on a grid that shows the scale precisely. That really helped, as I knew the size of my old knob. Other sites just had photos of knobs without any scale grid, and I had no idea how large they were. Thanks AppliancePartsPros! 31 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes