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[unlucky mark mv6]

As the aircon on my vec has been out of use for approx 2 years,i am now wanting it working again.As there is no gas in the system though,is there anyway to test the compressor to see if aint seized without having the system full. :-/

[M]

Put it on Auto and listen for the compressor engaging?

 

[Andy B]

Put it on Auto and listen for the compressor engaging?

 

he'll be waiting a long time if there's no gas in the system 

[robmac]

call out a local aircon guy. he will fill it with nitrogen to pressure test it. that way you can test the compressor and he will do a sniff/ultraviolet test for leaks.
had a guy out to check my omega, charged me £20 and detected a leak in the condensor radiator. ordered a new one from autoairconparts yesterday for£104 all in. busy weekend ahead fitting that and doing cambelt change!!!

[unlucky mark mv6]

Put it on Auto and listen for the compressor engaging?

 

he'll be waiting a long time if there's no gas in the system 

Ill be waiting a long time anyway andy,as there is no auto on my vec ,just an a/c on/off button.

[rbrueford]

I would have thought that switching the engine on and then whilst pressing the aircon button, seeing or rather listening to the engine tone/rev counter and see if the rev's drop? Wont do much harm if its switched off rapidly i would have thought.

[Osprey]

Andy B's point is that, with no gas in the system, the gas pressure switch will prevent the compressor clutch from engaging.  Safety feature to prevent the un-lubricated compressor from destroying itself. 

I believe you can check that the compressor is not seized by applying 12V directly for a second or two.