My wife and I purchased GE profile applieances including a wall oven and advantium microwave 3 years ago from a local appliance dealer.  Within the warranty period we noticed the oven temperature was out of whack. We had the GE rep in to check the unit to find out that our suspicions were correct and that the unit needed to be re-calibrated. in addition the temp. probe needed to be replaced.  Now a few years later the unit is once again operating incorrectly and we...