IMHO, there is nothing worse than an unreliable oven. The first thing i did when we purchased this home was to buy an oven thermometer and check the oven, even though it was a recently-purchased stove by the previous owner. Luckily, the oven temperature was exactly right. Had it not been, I would have checked the warranty, but whether in or out of warranty, a repairman would have been called and the oven fixed or the stove replaced, if at all financially feasible.