Why is my heater only blowing cold air? on 2005 Chrysler Pacifica

fans are working, car is not overheating, radiator has been flushed and filled, also just had air out of line, but am told he may not of gotten it all out due to lack of correct tools, also have been told it may be the water pump. ???

Asked by for the 2005 Chrysler Pacifica
How are the heater hoses, both hot at operating temp, both cold, one hot and one cold.