Aircon leak
 

It was last year when I found some white mist outta my vent, that my aircon is not blowing cold air anymore.

The blower and compressor is still turning on. Also, I used a screwdriver and did a quick poke on one of the aircon valves (beside the radiator), and "psst" there is still air pressure coming out.

HOW MUCH am I looking on spending to fix this?

Aircon sticker says 134a.

Depends what is wrong with it... You may have to take it to a shop and have it diagnosed.

Other than welding, is there another type of repairing a small leak?

Can anyone recommend a aircon repair shop in Mississauga?

I was tempted to choose a Stop Leak solution....