Its About 20 Years Old. Used It For 5 Hours Yesterday And Today It Heated Up To 350 But By The Time The Cookies Should Have Been Done It Was Down To About 250 And When Turned Up It Went Down To 200. Any Ideas? Btw, Does The Oven Share A Pilot With The Stove Top? Its My Neighbors And She Is Using Mine Now. Looking In The Broiler I See The Main Big Flame And A Little Slotted Box In The Back Just Left Of The Big Flame Glowing. But When It Kicks Off The Glow Dies Out. So Where Is The Pilot?