Quote Originally Posted by bcr229 View Post
It's not the matt that malfunctions, it's the thermostat controlling it. Some run wide-open when they fail, others shut .
Sorry I should have said when not connected to a thermostat. Everyone knows that they shouldn't be run without one but if they are that's what I have heard is the case when they malfunction.
I know first hand that when a microclimate on/off thermostat malfunctions it turns on full !! I was lucky to catch it relatively quick before anything bad happened.