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Unfortunately air con units are pressurised with a volatile gas which over time "leaks" out and eventually stops cooling any air .you will need to have it re gassed or repressurised...ballpark figure is about £75 to have done but you may find someone who can do this cheaper.system need re gassing every so often.
You first have to be sure that they have charged the system with the correct amount of refrigerant, not too much, not too little. -2) Refrigerant level could be just right, but if Radiator cooling fans are not working at full speed, a/c won't get cold. -3) a/c condenser [the thin radiator in front of the Radiator] has to get good air flow through it to cool the refrigerant & bring the pressure down.. check for blockage of air flow there.-4) if al else fails, have refrigerant drawn out, evacuate system to -25 psi vacuum for 45 min. then recharge system to proper level by volume in lbs. & oz's., not just psi. pressure. This will ensure correct refrigerant level for optimum refrigeration.
Do not play with this vehicle,if AC not working then take to a dealer or someone who understands jags ,these systems use a lot of complicated sensors and pressure detectors ,and they always leak gas and need rechecking once a year .The pipes go porous,the O ring seals play up and often the thing will just dump the gas out of the compressor for no obvious reason ,except to us that repair them ,its caused by the fan not coming on when the AC is turned on and it builds up too much pressure and ,this is caused when one of the these pressure sensors switches play up
Hi. It will need to be re-gassed at ur local air con place but b4 u take it there make sure the compressor is working when u turn ur air con on. If the clutch on the compressor does not engage its a sure sign it is out of gas.
sounds like the air-con gas is low switch on air-con a nd check to see if the compressor clutch is pulling in if not reove h/p dust cap on the aircon pipe press schroder valve to see if gas escapes if not will need re-gassing even if you get gas out without a pressure gauge it is hard to tell if the right anount of gas is in the system.