We the unknowing, starry eyed, wowed, and have too much confidence in our wonderful dealer need to start demanding a one(1) week satisfaction return policy. The proof that all systems function should be done before signing anything - they already have your deposit (usually). Best excuse for not running AC, slide(s) and appliances is it's not plugged in because service is using the outlet. Bought mine in October, first weekend after the furnace didn't work (40F went to Walmart electric heater), kinked hose, took service two hours to correct on site the next day.
By the way no mention of sawdust and spare screws hidden for your enjoyment.