Has anyone ever replaced the expansion valve and receiver drier on a 94 Grandvilla? If so how long did the parts lasts before you had to replace them again?
David
I had every intention of replacing the expansion valve when I replaced the drier.... however.. the large nut on the freon line was corroded so badly that I risked twisting off the fitting so I settled for a drier and gave up. I did replace the freeze stat though with a commercial refrigeration model that could be adjusted.
A good vacuum was drawn and after a recharge with 134a I have been in good shape for over five years. I do have to add 134 each spring but That's no big deal.
A lot of people, me included, like Kroil to remove corroded parts. Some times you can remove the part shortly after spraying it on but often it takes several daily applications along with tapping the part. Some antique tractor rebuilders take months to free stuck pistons by applying Kroil and tapping every day until they free up. Another trick that have seen work should only be used on really stout parts and that is to hold a hammer to one side and whack the other side several times. And finally, you can heat parts with an oxyacetylene torch. If you use the last method make sure that nothing will be damaged by heat such as seals, etc., unless you plan on replacing them anyway.
Thank you for the info. I replaced these parts 3 years ago and now the unit will not draw in the freon, so i'm thinking they are plugged up with foreign material.