Help control panel

[Alanna]

I have a 1996 Thomas Built bus and the control box that works the defrost, drivers fan, dome lights etc has stopped working. It would occasionally not work and if I open and slammed the access panel it would start working again. Well that solution has now stopped working. I need my fan the most. It’s so hot in the south. Does anyone know anything about that control panel access box? I’m not mechanically or electrically inclined. I’m assuming it’s either some sort of pasted switch, fuse or relay thing because the whole thing stopped working. I did check some fuses that looked fine.