I've had my MES for about 3 years and have been using it fairly often. Last year I replaced the connectors to the heat element whi check has prolonged its life. Most recently, I noticed that my MES will heat up to 300. The temperature reads right temperature but no matter what I set, it ignores and heats it up to 300. Would replacing the thermometer inside the unit fix this? Or just suck it up and upgrade the wiring to thicker guage? Love making beef jerky on the MES so not sure what I would replace it with. Thanks.