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AC efficiency over time

MarkJ on Wed June 24, 2009 4:12 PM User is offline

Year: 1997
Make: Ford
Model: Expedition
Engine Size: 4.6L
Refrigerant Type: 134a
Ambient Temp: 80
Country of Origin: United States

Just a couple of quick and hopefully simple questions. I have a 97 Expedition which has never had the AC serviced. It still works reasonably well but after 12 years, can or will it lose some refrigerant and does it need to be topped up to return it to peak operating efficiency?

Thanks,

Mark

robs on Wed June 24, 2009 4:49 PM User is offlineView users profile

There shouldn't be a reason for a vehicle to be "topped off" other than the fact that it's low on refrigerant and the cause of that is that there is a leak somewhere. But since your system is 12 years old, it might be that the compressor might be on its last leg performance wise, just not pumping as well as a new compressor. I would just take it to a shop, have the system tested for leaks, and if it all comes back with no leaks, just run it till it quits.

TRB on Wed June 24, 2009 4:55 PM User is offlineView users profile

This vehicle uses spring lock connections in a couple different places. These are know leak points so I would expect after 12 years you are not only low on refrigerant but oil as well. As Mr. Sanchez stated it would be wise to have a leak test done. Preferably have someone reclaim the refrigerant so you have a known charge level and then go through the normal leak test procedures.

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MarkJ on Thu June 25, 2009 4:03 PM User is offline

Thanks for the quick responses. I am a bit confused though, it sounds like the system shouldn't have leaked anything over the years but that it probably has due to connectors, O-rings, etc. So, should I have an AC repair shop check the system and potentially add refrigerant and maybe some oil or just leave it alone?

Thanks,

Mark

TRB on Thu June 25, 2009 4:10 PM User is offlineView users profile

With these type of connections the odds are you have a leak. That a glance at the connections for oily residue. Good chance you will find some unless you keep your engine bay cleaner than most!

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

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