Dear Mr. Guru, I just brought C 180 M/T 1995. i had a problem. my AC just blow the fan, there is no cool inside. i fulling the freon just like yesterday, cool only come 1 day, after that hot again. help me to solve this probs. thanks.

There is a valve that stops hot coolant from entering the heater box. It is probably stuck open. murf427

Hello, Are the cooling fan(s) coming on with the truck in park and the engine at idle? If the cooling fan(s) are not working A/C will not cool with truck setting still.

check all fuses first. does ac compressor come on? if not, unplug pressure switch in low pressure line near where you add freon and short across pigtail. comes on now and cools? replace switch. if not plug back in. apply manual voltage to ac compressor. comes on and cools? if not compressor or clutch is bad. if it does, check ac relay. that's about all you can do with limited tools in the driveway. if no progress has been made, time to take it to the pros.

you may find that the cooling fans only run at half speed when the a/c is on they might be set that way & run at full speed when the engine starts to overheat (in stop & go traffic) the a/c may need regassing that's why it is not cooling properly.....hope this helps...... cheers..

The fans are inportant but the regular raditior fan will do it and the road speed of the car will blow enough air though the codenser to make it cool if it's going to. Does the compressor turn on? if it does do the lines hooked to it get hot?( the small one) and the big one get cold? The condenser should get hot, Hot enough to burn you and the freon level may be wrong and or the compressor isn't pumping. ( brocken inside)

There usally is a problem with the ac in general when the light does this,it can be the cooling fans are not working,check to see if they come on,when the ac is on,also make sure the freon has not leaked out.

I dont know how you can check it for being full or not? but most likely its low. If you have it on, and high speed like 2000 rpm and the a/c clutch goes on/ off in a few seconds, the refrigerent is low.

you should go to a mechanic and check the A/C if the freon id low it won't cool , some time at mornig it give you the semsation that is cooling but probably not..

need to check and see if cooling fans are working and working properley at some point wheren the high side gets up about 225-250 they will kick in to a high speed untill the presure drops but the fans will always run when ac is on/also may be to much freon

Do both fans on the inside of the radiator turn on when you have the AC on? It could be that the fan connectors were disconnected. you'll find them tucked away on the side of the radiator.
Is it always just cool air or does it get cold when you are driving? if it's always just cool and never really gets cold then you have either lost your freon or you're AC is not pumping freon. unfortunately you have to take it to an AC specialist to solve that and it's not usually cheap.