Our New World TGO 90 integrated Gas Oven & Grill is old but works well. But I think the Spring drop down oven door to main oven has either become unhooked or broken as one side is now loose and unstable (following a loud bang!) Is it possible to access this spring to see if we can replace it and if so, how? Do we need to pull the whole oven out of the housing or undo screws on the front? Any ideas??