Appliances come in a variety of parts. Each one has its own set of problems. Common problems are easy to identify if the cause is known. The heating coil and electrical connection can be checked to identify the problem. If this fails, you can always contact a professional to have the appliance repaired. You should always call a professional if you suspect that there is an even more serious problem.
If you suspect an appliance is experiencing an electric short, unplug it and check that no other devices are connected to the outlet. To properly fix an appliance that has been tripped, contact an electrician. If the short circuit is not detected by you, it's best to contact an electrician. Take the appliance off of its service immediately.