I have an old kenmore oven which one of my children were going to use the timer, now I can't get the oven to turn on at all. I need some instructions on how to set it back were the timer does't interfer with the regular function of the stove. It is a gas stove about 15 years old and the only numbers I con find on it is in the oven door 55545034P02. Any help would be appreciated as Thanksgiving is coming soon and I haven't been able to use it in about a year.