my car usually curculates the ac even if its off.
ex. ill be driving with the ac off and turn the *** all the way to the hot side and a little bit of heat would come out.
i used it especially in stop and go traffic. now it wont turn on or open (whatever term you like better).
what could it be?

 

I don't really understand your symptoms.
Could you try rephrasing them?

 

ok basically if the ac is off the air will blow hot or cold very slightly.
now its wont circulate at all.
the way i noticed is before i would be in traffic and my car would get hot. so i would just turn the ac *** to hot and it would lower the engine temp. now it doesnt work.

 

When you said that the air doesn't circulate anymore it sounds more like a blower motor problem and not a thermostat problem.

 

How quickly does your Car warm up?

What temperature does it stay at?

 

no the air works i can turn it on and all that.
when your air is off you can still feel air coming through the vents.
mine no longer lets the air in unless the ac is on.
my car warms up normally. and it stays in the middle unless im in stop and go traffic on the highway.