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Check for Corrosion or Burning at the Controller Connections:
Check connections and check the secondary touch panel switches, to do this you will need to remove the controller from the tub.
If the connections are burnt or corroded then the controller and harness will need replaced.
If there is signs of corrosion on the secondary touch panel, check for leaks on the tub flange, ensure this is not leaking when getting hot.
Also check drying fan operation, and that the product vent is not blocked off causing a build up of condensation.
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