Igot the exact problem as "Myhoodie" (All of my push buttons properly light up as they should - when they should. The problem is that it is not engaging.)

I put the battery of, and it worked just fine after that.do you think its the vacum switch, and if yes , i dont know were to find it and dont know how it looks like can anyone help me please?

 

I feel like this question has been asked a hundred times on this forum if not more. Sorry if I seem mad but just use the search feature...you will find your answer because this has been answered many many times. Just try the many different solutions you find searching.