Possible dodgy garage?

To do it right, you need to suck the existing gas out. Ice and water can get in there, and cause corrosion, especially if the previous owner did not use a vacuum pump to suck the existing air completely out.

Doing this will prolong the life of the system, and maybe make it more effective.

Sucking the air out also causes any water that may have condensed in there to evaporate and come out too.

if the system has been opened up it needs to be "vac'd" this means putting a machine onto the system to suck out the air that has entered the system the air will have moisture in it and this is bad for the pipes he's not trying to rip you off but to give you an example, I work for a company that uses refrigerated vans, these have sometimes been left for a whole weekend to be vac'd out as it's easier to do it that way than it is to rip out the insulation to get the piepwork out when goes off

All the parts are sound as the air-con was completely over-hauled by the previous owner last year. So I thought I'd check with the garage at the bottom of my road, as they advertise air-con re-gassing for £50. I explained that all I needed was a re-gas, but he was trying to convince me he needed to suck the air out of the system first?? which would require him having the car for two hours. Is that right?? thought you could just put the gas in straight?which only takes about ten minutes? any thoughts?

Cheers

Austin

Thanks for clearing that up :) will pop back to see them on tuesday.

Austin

A good job involves sucking it out and measuring how much you get (to assess leakage and contaminants), then a refill with gas and the correct quantity of oil.