try the main control unit on the inside of the car,make sure its working they will often go bad and wont allow the actuator door to open and that wont let the heat come out,you could also have a bad heater control valve in it,they mount in between the heater hoses on some models,and this will prevent heat from getting in,but you said the hoses are getting hot,so it has to be the inside control unit ,you may have to replace it,to get any heat from it,its that time of year,and every ones having problems with their heaters now,good luck with it.