12 months after Bosch Dishwasher repair

Well it's nearly 12 months since the repair of the Bosch dishwasher and the wash cycles have again become extended.... upto 2 to 3 hours so the soldering iron has been taken from the cupboard. The solder spot on the controller board does not look bare but certainly looks burned. I have resoldered the spot as described before and now a test cycle is running...... cross my fingers! ............................About ninety minutes later, the big "0". ie. finished as it should have. Wonder how long this fix will last?