Pulled code # 1530
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FTE Legend
Joined: Jul 2005
Posts: 65,938
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From: Millersville, MD
Pulled code # 1530
Says A/C Compressor Clutch Circuit open. A/C blows hot air....go to VENT and the EATC controls the temp fine (ambient air only). It's on a '97 Lincoln Mark VIII if it makes any difference.
Clutch does not engage but the compressor does turn. Also the EATC will NOT go into the test mode. Push OFF and Floor at same time, then AUTO within two seconds. Nothing. Anyone got any ideas? Is this a clutch gap problem? New clutch was installed about a year ago.
Clutch does not engage but the compressor does turn. Also the EATC will NOT go into the test mode. Push OFF and Floor at same time, then AUTO within two seconds. Nothing. Anyone got any ideas? Is this a clutch gap problem? New clutch was installed about a year ago.
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FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Behind the code 1530 in my code book, it has in (), (VLCM). Variable Load Control Module. Guess it's time to go through all the Pinpoint checks to find out what it really is.....guess it COULD be the EATC - or it COULD be the VLCM ...... or it COULD be the clutch clearance issue (I now doubt that).
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FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Behind the code 1530 in my code book, it has in (), (VLCM). Variable Load Control Module. Guess it's time to go through all the Pinpoint checks to find out what it really is.....guess it COULD be the EATC - or it COULD be the VLCM ...... or it COULD be the clutch clearance issue (I now doubt that).
projectSHO89 - Why do you say it sounds like the EATC? Is there any way I can confirm that it is?
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
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From: Lorain County, Ohio
Bud,
For info specific to your Mark VIII, you might try www.lincolnsonline.com.
I too suspect a failed EATC unit, but if the refrigerant charge is low I believe that will also set a fault code and disable the compressor. (sorry, I haven't worked on an VIII in a long time). You may want to check the system pressures just to make sure there is enough pressure to enable the compressor circuit.
For info specific to your Mark VIII, you might try www.lincolnsonline.com.
I too suspect a failed EATC unit, but if the refrigerant charge is low I believe that will also set a fault code and disable the compressor. (sorry, I haven't worked on an VIII in a long time). You may want to check the system pressures just to make sure there is enough pressure to enable the compressor circuit.
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FTE Legend
Joined: Jul 2005
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From: Millersville, MD
I belong to Lincolns of Distinction too..... just was trying to get as much input as I could.... Refrigerant is fine. Running 120 lbs pressure on low side withOUT the compressor running.
'preciate the advise! BTW, everyone is saying EATC ... but I AM hedging my bet....got a VLCM coming in too WITH the EATC. LOL
'preciate the advise! BTW, everyone is saying EATC ... but I AM hedging my bet....got a VLCM coming in too WITH the EATC. LOL
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More Turbo
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From: W. Wisc
Says A/C Compressor Clutch Circuit open. A/C blows hot air....go to VENT and the EATC controls the temp fine (ambient air only). It's on a '97 Lincoln Mark VIII if it makes any difference.
Clutch does not engage but the compressor does turn. Also the EATC will NOT go into the test mode. Push OFF and Floor at same time, then AUTO within two seconds. Nothing. Anyone got any ideas? Is this a clutch gap problem? New clutch was installed about a year ago.
Clutch does not engage but the compressor does turn. Also the EATC will NOT go into the test mode. Push OFF and Floor at same time, then AUTO within two seconds. Nothing. Anyone got any ideas? Is this a clutch gap problem? New clutch was installed about a year ago.
I don't know this specific code, but if the description is AC clutch circuit OPEN then I would look for a bad connection, clutch coil unplugged, check voltages at the clutch coil, etc. Could be a bad connection or a bad coil or....
Another option is the LP switch is bad preventing the clutch from engaging (you said you had 120 psi at rest, so the system is charged).
But the part about not controlling the temp in one mode only is weird. That has me puzzled...
-Dave
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FTE Legend
Joined: Jul 2005
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From: Millersville, MD
Problem solved.... as I have never had the main compressor electrical plug off, I don't have a clue of WHY this happened. Found main plug on compressor with one pin not pushed in.....like someone pulled the plug and when they pushed it back on, it was misalligned and they pushed it in/on anyway and pushed one pin out...but not all the way. It lasted for ???? thousand miles until last week when it disconnected.
How we found it was I was going to check clutch for proper shim clearance and pulled both plugs on the compressor just for the heck of it....a light into the plugs found the pushed out pin.
So Dave, what you just said makes all the sense in the world.....Glad I found it yesterday as today I was giving up and taking it to the dealer..... I'll bet it would have gotten expensive!
Thank you all for your input.
How we found it was I was going to check clutch for proper shim clearance and pulled both plugs on the compressor just for the heck of it....a light into the plugs found the pushed out pin.
So Dave, what you just said makes all the sense in the world.....Glad I found it yesterday as today I was giving up and taking it to the dealer..... I'll bet it would have gotten expensive!
Thank you all for your input.
