heater

Radiator is full of water, heater core flows water through it, new thermostat, does not overheat. Turned the heat to hot amd only blows cold. I am at a loss. Give me ideas peeps!!!

Hi folks, Okay when I did the radiator flush the temp gauge would go to normal setting but when I turn the heater on full force the temp gauge would decrease and all I would get is cold air, turn it off the heater it goes back to normal. But when I detach the AC pump (electrically). I would get...