Trouble with 2000 ford explorer AC - only blows warm air - bought refrigerant - gauge said it was low - filled as per instructions still blowing warm - where do you go from here Thanks?

low freon or none

if you have already replaced the thermostat ,try replacing the heating core . it's located under the passanger side dash . There are a number of other things to investigate before going to the major...

it cant go warm to warm that makes no sense

It appears that it is low on freon. Did you evacuate the system??? Take it to an a/c mechanic. Answer. could be the "head unit" or A/c contols in the dash.

more than likely it`s the heater control valve(HCV) that needs replacing