ok so i have a problem. I have no heat in my truck, if i keep the blower on low i get some but its barely enough to defrost the windshield. all hoses get hot, radiator gets hot, has a new water pump, heater core, thermostat. the blend door works too. i am completely lost as to what is wrong. it started a year ago when i drained all the water out and put antifreeze in it. since then i dont have heat. if anybody has any other suggestions as to what it could be it would be greatly appreciated. though the winter this year in lower michigan has been fair, no heat still sucks lol!