Do not use one of the cans from Halfords. Whilst I don't doubt that the Halfords can will improve the air con slightly, you really should go to an air con specialist (or garage that deals with air con) who should do the following:
1. Check for leaks. If all is found to be well, then the following is done
2. Evacuate the system - suck all the refrigerant (gas) well, the gas that remains anyway out of the system
3. Fit a new received / dryer
4. Vac the system (suck out all air and moisture) for at least 2 - 3 hours
5. Fill the system with new gas along with the specified lubricant for the compressor and a leak detection dye.
After this, it is important to run the system for at least 10 minutes every couple of weeks or so. This keeps the system active and stops the various seals drying out. Every year, get the system checked and every two years have the receiver / dryer replaced.
Hope this helps
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Topic: Aircon (Read 1352 times)