Got this on my 01 Eldo.....one mechanic says must vacuum lines before adding freon ....his cost $120............another mechanic said vacuum not necessary & added 2 cans of freon but no cool air but low refrigerant-a/c on off disappeared from info bar......he said he would need to do more testing to determine problem w/o messing with trying to bypass ? (something) and fix it right so computer would be correct in reading going ahead.....thinking about leaving with him tomorrow...........anyone have opinions? they are very welcome.
Low Refrigerant- A/C off
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2001 Eldorado 2008 DTS 2005 XLR 95 Eldo'11CTS-V,'66 corvair.'03 deville,'00 deville
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Compressor is off. Reset per built-in diagnostics.
Vacuuming isn't needed IF there's still some Freon in the system.
Vacuuming isn't needed IF there's still some Freon in the system.
Google "cadillac forums 2001 eldorado refrigerant charge reset" or something close.
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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I ran the codes but "reset" never appeared.
CORRECT - the word RESET is simply not used -
if you have a DTC - Diagnostic Trouble Code - or just CODE - for low refrigerant -
the AC compressor will be disabled to protect it from destruction -
you must CLEAR that code to enable the compressor -
CLEAR CODES is what you are looking for after pulling the codes -
Thanks, I kept looking for "reset" but PCM came up and i cleared all codes, then "no codes" showed up for PCM........I turned on mtr with "a/c" button off but fan on high.....then pushed AC button and it sounded like compressor engaged.....YAY!....Ill know if the AC is working/cooling when weather gets warmer but I think the compressor kicked in because it boosted the air coming in. 50 degrees out now.
(I guess clearing all codes on PCM cleared the low refrigerant code but it never "showed specifically that code).
(I guess clearing all codes on PCM cleared the low refrigerant code but it never "showed specifically that code).
It did, but if you are low on refrigerant, it will reappear shortly after you start using the A/C again.
Yesterday 60 degrees outside, tried ac but not cool air.....but low refridge no longer appears as I had 2 cans installed about a week ago......still stumped........( 1 mech told me had to vacuum line before adding freon)....but the one who installed it said not necessary but no cool air yet........cleared all PCM codes, sounds like AC compressor kicks in but not cold air.....maybe I need a new compressor ??
You only need to pull a vacuum when the system has been opened up.
Are both the inlet and outlet refrigerant lines at the firewall equally COLD, not cool, but cold?
A pressure test should help determine if the compressor is bad, but the mechanic who did the recharge SHOULD have checked for that.
Are both the inlet and outlet refrigerant lines at the firewall equally COLD, not cool, but cold?
A pressure test should help determine if the compressor is bad, but the mechanic who did the recharge SHOULD have checked for that.
2001 Eldorado 2008 DTS 2005 XLR 95 Eldo'11CTS-V,'66 corvair.'03 deville,'00 deville
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2,425 Posts
I assume you mean hooking up a set of gauges to check the operation of the system...which I see NO mention of in this thread as being done. \Dumping in 2 cans of Freon doesn't count as a fix.
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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22,639 Posts
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The mech hooked up gauges, etc....kinda puzzled why cold air not coming thru.......so he wanted me to come back and leave with him...so I guess it has come to that....I just thought it might be easier fix by clearing codes, etc but not happening,,,,I'll bite the bullet and hope his fee is not crazy high.
Yes, that is what I was referring to.
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