Occasionally we have what seems to be a timer malfunction with the stove. The oven will not turn on. Reading the manual this is attributed to the off timer dial not being pushed in. We never use the timer and never change the off dial to on. Additionally pulling out and pushing in the off timer does not allow the oven to operate and we randomly turn dials until it works again. Any advice on how to avoid this situation? Thanks, angelaflynn80@msn.com