With a sleek surface that works perfectly well for slipping into a countertop or kitchen island, glass cooktops have become a popular home implement. Most homeowners enjoy their cooktop for many years without any problems, but occasionally, these appliances can develop problems. If you have an older glass cooktop that is starting to have problems, working with an appliance repair professional is your best plan of action. Here is a look at some of the common problems with glass cooktops and how they can be repaired by a professional. 

Problem: One element is not coming on. 

All of your stovetop elements are working but one. You can continue to use the rest of the stovetop to cook, but it is best to have this repaired by a professional when you do decide to make the necessary repairs. Replacing an element in a glass cooktop is not the easiest thing to do. The underside of the appliance has to be disassembled, and you have to make sure you get the proper replacement element with the appropriate wattage or it will not work. 

Problem: Two or more of your stovetop elements are not working. 

If two of your stovetop elements stop working at one time, it is usually a sign that one of the central elements' control switches has gone out. These units have interconnected wiring, so if a center element switch goes bad, it can cause the element next in line to stop working as well. 

Problem: The "hot surface" light won't turn off. 

Most glass cooktops have an indicator light that alerts you if the surface is still hot. This light serves as a reminder so that you do not get burned or sit anything on the cooktop while it is still hot. If something is wrong with the cooktop, it is not uncommon for this light to stay on. For some of these appliances, the indicator light is automatically triggered if there is an issue, but the always-on light can also be a sign of an electrical issue. 

Problem: The operating knobs will not turn. 

Each individual knob has its own element control switch beneath it. The internal mechanisms are what allow the knob to turn freely to operate an element. If a knob will not turn, it usually means the underlying switch and the turning mechanisms have malfunctioned. Therefore, the element control switch will have to be replaced. 

For more information about appliance repair, contact a professional in your area.