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Hi, welcome to Just Answer. My name is ***** ***** I look forward to helping you! I suspect the electronic control is having trouble. Turn the breaker off for a couple hours to reset the electronics. Any change when powered back up?
It sounds like the main electronic control has issues. I did find that your model is involved in a safety recall, see the link below. Has this been taken care of on your machine?
It may be that the power is shutting down when the heater comes on to draw a high current. That is what the recall is on, the cord causing fires.