heated driver seat is over heating

Living in the northern part of the country, winters are cold the heated seats are a must with leather seats. I turned the seat heater on and with in a few minutes my back felt like it was burning and there was a burning smell from the seat heater overheating. I turned the seat heater off immediately to stop any more damage. I see this is not an isolated incident, others have the same issue. I'm looking for the manufacture to resolve this issue and repair the seat heater.