Golf IV / Jetta IV :: Intermittent AC - Compressor Would Engage Then Disengage
Jun 8, 2014
I have an 02' 2.0 Jetta Wagon, and the A/C is having some issues. Since I know close to nothing about A/C systems, I took it in to a few places to have it looked at. I've had the whole system Evac'd and recharged, and have had the low pressure fitting replaced (apparently there was a slight leak there), and the system is still not working.
The A/C worked fine when I first purchased the car a few months ago. Shortly after my 800 mile trek from Oregon, back to home, the A/C started to only work intermittently. The compressor would engage, then disengage, repeat...It seemed like a bad idea to keep trying to use it in its sad state so I stopped using it altogether. As I said, I had the system emptied and recharged, but it still only works intermittently. It sort of follows a pattern where upon start up it works longer, and switches on and off at shorter intervals, until it doesn't engage at all.
There are no strange noises from the compressor, and when it was hooked up to the machine, it proved to be performing its function well.
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Clutch for the AC Compressor will not disengage even with the AC off. The only way I can daily the car is if I disconnect the power from the AC Compressor at the compressor itself. Seems the AC compressor has a constant draw if it is plugged in.
Plugged = dead battery...
Unplugged = good battery...
I'm getting ready to rip the damn thing off the engine and calling it a day, but that would defeat the purpose of me buying a new compressor.
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The A/C in my truck stopped working last year, and this year I intend to fix it. I believe the problem is with the compressor clutch because it was making noise as it would engage or disengage. It was making this noise for a good year or so, and then one day the noise stopped and I have no A/C. So I am only assuming its the clutch.
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Compressor does not engage, and my fans do not come on when I turn on the A/C. They do come on low speed when I jumper pins 1 and 2 on the temp switch plug, but they do not come on high speed when I jumper pins 2 and 3.
I have replaced the FCM with a new one, as well as a guaranteed working used one; neither one changed anything. I assumed right away that it was the fcm because my original one has a hole eaten through it from battery acid.
Compressor clutch ohms out within spec, and it will engage if jumpered.
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I have a 2002 Jetta 1.8t and the A/c doesn't work. I took a look and I know that the clutch/compressor does not engage. also, the rad fans do not turn on when I have the AC on in the car. all I get is hot air. I tested the line and there is no freon in them whatsoever. which is why the compressor is off. however, I can't add any freon without it working. I checked the fuses on the side of my dash and on top of the battery as they seem to be ok. Also, I was told that I just need to replace the compressor with a new one and I should be good to go. Is this true? It will be an easy fix if it is.
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03 Jetta 1.8T AC is giving me fits. When the compressor comes on the AC is nice and cold. Problem is that it isn't on very much. Today was a good example. No AC for about the first 30 min drive to get an oil change (local driving). Next 40 min highway drive, AC only got cold for the last 20 minutes and then started to warm up before I got to work. Drove to auto parts place at lunch, AC cold from start to finish. No AC all the way back to work.
So, this evening I started the car with the hood up and watched. Compressor wouldn't engage. Pushed the AC button a couple of times and clutch engages. Compressor stayed on for 7 minutes and ice cold air. Clutch then disengaged and immediately both fans went to high speed for about 5 minutes with warm air out the vents.
Fans cycled back to low speed and compressor clutch engaged again for about 2 minutes this time. Fans to high speed again for 3 minutes, then compressor engaged for only a minute. Each time the compressor shut down, both fans would go to high revs. The minute they would go to low speed, the compressor clutch would engage and I'd get nice cold air..
Just had the expansion valve replaced and r134a charged by and AC shop last week. I have had the on/off AC problem for months and then could not get the compressor to engage at all for about one month. Of course, just as I was getting to the shop, it started blowing cold air.
Not sure whether I'm looking at an electrical problem or what. Just seems odd that both fans suddenly speed up and slow down and the compressor engages only on low speed.
The only other odd thing I've noticed is that cold or hot, as soon as I turn the ignition on (engine off), one fan continually starts cycling on and off. It does that continuously. I've checked the fuses on top of the battery and they all look fine. No appreciable drop in RPMs when the compressor engages. Fan control module?
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I got a 2003 GTI 1.8t and the AC air is blowing warm. With the car on, AC on and fans full blast both rad fans turn on but compressor clutch does not engage. Took it to a shop and the mechanic said the system was full of refrigerant but that the compressor was not getting the proper signal and there was an electrical problem.
I check the power at the compressor and it is reading about 7 volts, which is low correct? That should be getting 12-13 volts correct? I also check the pressure switch over by the passenger side and it was getting 13v. What to check next to start ruling out causes? Any quick way to determine whether this is electrical or a compressor issue? I am limited in my abilities as far as electrical work goes.
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I went driving today and for a moment I could engage/disengage the clutch pedal with little to no effort. It goes back to the normal force after 3-4 shifts.
It's the exact opposite of what's happening in this thread. [URL] ....
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My 01 GTi (12v VR6) was having some trouble shifting into, and out of, first and reverse so after a bit of research I decided to try adjusting the shift linkage as it seemed like a possible easy fix. After doing that I tried backing it up in the driveway and after a couple of shifts to different gears it ended up getting stuck in reverse. When I pushed in the clutch pedal to let it roll forward I noted that it seemed to be resisting rolling forward despite the steep incline. Once it reached a less steep incline it stopped rolling forward completely, so I'm thinking that it probably won't come out of gear because the clutch won't disengage all the way.
I've done some searching around and from what I've read so far it sounds like it could be a worn or damaged clutch fork, the hydraulic lines, master or slave cylinder, or even a broken clutch plate. What I don't want to do is pull the transmission and clutch, only to find that it was something much easier to fix.
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My cruise fails to engage, sometimes first thing in the mornings, sometimes in the afternoon, cold engine or warm, fresh start or on resume. After the car is turned off for a few, something is resetting it and it then works fine. Wondering if this has something to do with a faulty switch, fuse, or whatever. I've tried the cruise switch on the stalk in turning it off for a while, keeping it pressed in, turning it back on, everything.
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owner of a 2007 Passat 2.0T wagon, 6 spd manual, 32k km's. (leased) I'm having repeated persistent parking brake failures (won't engage, or won't disengage).
-About two months ago the parking brake would not disengage, error message on the MFD, yellow warning light and warning tone. Called roadside, finally got it disengaged by removing one terminal from the battery. Took it straight to the dealership, they "fixed" it by resetting the computer.
- The next day I have auto hold engaged, parking brake did not disengage when I turned the car back on. Had to turn engine on/off several times before it disengaged.
- Took it to the dealership again, had to get a rental car over a weekend while they diagnosed the problem. This time they changed some wiring and replaced the parking brake button.
- Next day the parking brake engaged ok but wouldn't disengage. Same routine on/off/on/off to get it to disengage.
- Back to the dealership again, they decided to replace the brake control module but didnt have stock.
- Last week I took the car back in (4th trip for this issue), they replaced the module and said it was fixed. Next day my wife got stuck in a parking lot with the parking brake stuck on.
- Called the dealership last friday and asked them to come pick it up this time, as my wife and I are sick of the inconvenience of this issue. (we share the car, both work, and also have a child's daycare to schedule around)
The problem is intermittent but not difficult to cause a fault. Can be caused when engaging, disengaging, or when the PB kicks in from auto hold when turning the car off. I try not to use it, but sometimes is necessary (parking on hills etc).
The dealership doesnt seem to know the problem and are just throwing parts at it. What recourse do I have for repeated problems? The manual recommends using this parking brake EVERY time the car is parked, so I don't think it's too much to ask to have it working properly.
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I recently bought a 1997 f150 4x4 with shift on the fly. I bought the truck from an old man who parked it outside his house. I love the truck, but the 4x4 has been finiky. I have done a ton of research and i have done a bunch of testing. The vacuum system is working correctly. I have tested the solenoids and the front axle actuator is working properly.
There is some kind of electrical issue. It might be the GEM (i really hope not), but it might be the shift on fly switch itself.
The 4x4 will engage, but when i turn the switch to 2h nothing seems to happen. Driving in reverse doesn't work. But sometimes it switch from 4h to 2h, just by turning the truck off and restarting it. If restarting doesn't work, then i have to pull the 5 fuse, let it sit, then put it back in. I read that this resets the GEM. (Number 5 fuse, middle row, 5th from the top).
Resetting the GEM usually does it, but not all the time. Sometimes it will still be in 4x4 again after resetting the gem. And then what is really weird, after driving it in 2h (after the gem reset) then turned it off and restarting it, it will go back into 4x4. All this happens with the switch set to 2h. So I have been having to reset the GEM, each time i restart it. (This was going on for a day or so.)
Any easy testing i can do? Do you think it could be the switch on the dash, or more likely to be the gem? I hope it isn't the gem. I don't want to have to pull a fuse each time to drive my truck.
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I have charged system 134 ... Compressor works at start up until warm, then light flashes and compressor disengages. No noise and gets cold until motor gets heated.
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Just noticed yesterday that the compressor clutch does not disengage while the air conditioner is on. It is 2005 V6 Sonata Elite. All the other cars I have ever owned had compressor clutches that cycle. Internet searches indicate that there might be air conditioners with only a low-pressure switch.
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I think this is just poor dealer service, but I need a sanity check.
I have 93k miles on my Corolla. My clutch creaks like an old school bus when I engage and disengage. It's done this pretty much all along and I think I had another dealer successfully lube the linkage to quiet it down -- it was miles and years ago so I may be misremembering that.
My current dealer says all they can do for it now is REPLACE THE WHOLE FREAKING CLUTCH assembly to the tune of $1,300. Clearly, I'm not doing this. As long as it works, I ain't replacin' the clutch, but, REALLY?
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My Chevrolet 1992 Caprice Air conditioner is chilling but the compressor doesn't disengage when reach the right temperature inside cabin... There seems to be a temperature control or a sensor and I don't know where is it...
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This past monday morning I got in my 05 Legacy GT w/ 82,000 miles. When I turned the key it acted as if the starter engaged for a second then disengaged and made the typical motor winding sound. I tried it several more times with the same result. So I reluctantly called my local repair shop and had it hauled over for what I thought was possibly a bad starter. The mechanic went out to check it to see what it was doing and when he did, it started right up…..!! He said that when it started it ran as if it had been flooded for a minute or two then cleared up. Throughout the day he drove it around and started it about 20 times and said it “appears” to be ok. It’s a small shop that I trust with my other cars but they don’t have the tech to pull codes on a subaru. So my question is, what was the cause of this issue? Neutral Switch? Cam Sensor? or a Fluke?
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Is there a correlation between a Prius sitting in the hot sun and the computer malfunctioning? When I came out from a movie yesterday, the temps read 106 degrees outside the car. The emergency brake light was on, though the brake was off. I pumped the brake on/off a couple of times, but the light stayed on. As I pulled out, the brake seemed to engage, then disengage causing the engine to stutter and surge. The service tech today tells me the computer is not communicating and at 50,000 miles. Is it worth the money to get the new computer? Will the car be safe afterwards?
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So I just had my entire clutch replaced while another repair was taking place. What I've noticed is the "clutch engagement" has changed. Where as I would have the clutch start to engage/disengage at the 1/2 way point on the pedal travel is now the last 1/4 of the pedal. Is this a "normal reaction to a new clutch that just takes getting used to or is there an adjustment I can fine turn it with? Do I just have to wait for it to "break in"? When I replaced the clutch on my dearly departed 94 ranger, I replaced the bearings & disc only reusing the pressure plate and did not have this issue.
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MKIV jetta GLI, first two gears just won't engages as if it's still in neutral. Have to start her moving from 3rd. What could be the issue?
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AC compressor won't kick on at all. I know the system doesn't have much refrigerant (just replaced the line that runs from the expansion valve to the bottom of the drier, the drier itself, and the condenser)..
Evacuated the entire system with a pump. Tried putting refrigerant in and the pressure on the gauge goes up immediately into the yellow/red...jumped the connector on the high pressure switch and the fans came on, shouldn't the compressor kick on too?
Checked the 14 pin connector on the fcm for 12V...PIN number 8 is barely seeing any power which leads to no power getting to the compressor...
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