The broiling element (Upper) does not come on if the door is not closed - I realized this when I tried to test the element using Broil - it kept saying 'Close Door', and would not heat. Therefore by replacing the door switch it fixed the problem with coming up to temperature on Bake - I guess the upper Broiling element is used in addition to the baking element to get up to temp.
Changing switch is trivial - just pull/pry it out and pull off connectors and push it back it in.
Oven has worked perfect last 4 months now - all because of this switch we had been dealing with this for over a year!