If one is needing to remove/replace the aircon parts how can i be sure there if no r134a left in system.
There is prity big leak judging on the amount of die that is around but untill its stripped its not posable to know for sure as the leak is in inaccesable position.

 

You can just press a guage into the high and low ports. 0PSI and it should pretty much be empty.

If there is pressure then you can't remove it, you have to specially vacuum all the leftover refrigerant in the system and only garages have the type of system to do it. If you don't even know how to check, then i would take it to a shop and have them replace the seal or part that went bad and refill the system.

 

Taking to garage = min 16 hours labour = expensive + parts (approx £2500 total).
Change part myself = 16+ hours labour = nowt + part at £200 + regas £50 (£250 job done and working).

 

And maybe going blind…. Good luck!

 

Releasing refridgerant into the air is illegal here in the states.

Also, whenever exposing the system to atmosphere, you should replace the dryer as well.