My currior furnace has a colector box it has 3 plug in wires atached and two hose,s as in my first post the furnace runs well until it shuts off then I have to tap the colector box to get it to ignite and run until the next time it shuts off. What does this colector box have to do with lighting the furnace to make it run? I thought it was the board but after taking it apart (the colector box is atatched to this board) and taping the wires on the colector box I see that it is for sure the colector box. Why is this? And would this be the problem? Is the bos exspensive?

You better post some pictures for this one.

Yep, post pics using "go advanced". The technical term "collector box" is not understood.

Guess: Condensate pump and a water switch. But it's not even a scientific wild a$$ed guess.