Hi, welcome to Just Answer. My name is XXXXX XXXXX X look forward to helping you! There is a thermal fuse in the unit that opens if it gets too hot, usually if it is used for extended periods or if the water tank is left to run dry. This fuse has likely opened. You can easily locate the fuse by following the power wires in. The fuse will be in line with the main power wire and should show continuity when tested with a multimeter. Let me know what you find.
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