Dismantling to discover the fault should be fairly straightforward to anyone with handyman skills.
Picture isn't very clear but I am guessing there has been a small water leak causing one of the heating element terminal posts to corrode through.
It would be a good idea, before starting, to contact the manufacturer or dealer to discover the price and availability of the parts that could be needed - element, seals, gaskets...
Orange discoloration is most often caused by rust or other minerals in the water.
Usually, the solution is to have a filter (or more than one) installed in the circuit.
God bless your efforts.
