My heat doesnt seem to be working
I have a 93 ford school bus. It doesnt seem like the heat is working. I notice that there are two hoses coming thru the firewall into the bus. One of the hoses has a valve on it. Its turned all the way open but I stil have no heat. It seems to me like the heat is created with the coolant in the radiator and it is supposed to go thru these hoses. Can anyone help?