Whirlpool gold cooktop

My whirlpool 9" cooktop element heats warm but will not heat super red, all the other elements work fine. What needs replacing? Where do I start to replace the element or stat.

Well, the switch controls the element, so that is what I would replace. Tom Appliance Educator, Appliance Parts, Washer and Dryer Parts, Refridgerator and Freezer Parts, Stove and Oven Parts