AC issues

I just had my 2001 Tacoma
Worked on at the dealership and after using the heater my ac or even cool temp stopped working and blows med to hot air does anyone know of a fix before I have to take back for another 500 dollar dealer trip

 

What did you take your truck to the dealership for? Was the AC working before you brought them the truck?

 

I had the timing belt replaced water pump valve cover gaskets plugs and wires replaced and rear breaks adjusted and yes ac worked fine and for some reason today it is working fine I disconnected both battery cables for 5 mins and today all is fine weird

 

Well, it's working again and that's great.