Mark F Florissant , MO January 30, 2016 Appliance: Amana Electric Cooktop ACC4370AB Cook top fan control knob broke off Removed cook top knobs Lifted top an inch by bracing underneath with lumber Unfastened screws around the side (under the glass) holding the glass top on Made sure not to unscrew attachment to burners Unplugged wiring harnesses and stowed cook top away Unfastened enough screws to turn control switch area over Removed nut holding fan control onto metal control switch area box Replaced fan control with part from AppliancePartsPros, connecting just as old one was Used new nut to attach new control to box, verifying correct orientation of knob Reattached all inside screws Replugged wiring harnesses to cook top Replaced cook top and fastened surrounding screws Removed supporting lumber Replaced cook top knobs Read More... 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Nut Drivers, Screwdrivers