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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old July 1st, 2011, 16:25   #31
Mach1
 
Join Date: Sep 2005
Location: Spicewood, Tx.
Fuel Economy: 49.3, 48, 21.2,19.99
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My 2006.5 HAD ac delay since driving off the lot..It took a good 5 minutes or a couple of miles to start cooling..

Lately it started to be delayed to 10 minutes..

I tried replacing the switch, which helped..

My 2005.5 climatronic has had no delay and is ice cold for Texas..different compressors I bet..
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Old July 1st, 2011, 18:12   #32
ccisney
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Join Date: May 2011
Location: Rosamond
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Quote:
Originally Posted by Mach1 View Post
My 2006.5 HAD ac delay since driving off the lot..It took a good 5 minutes or a couple of miles to start cooling..

Lately it started to be delayed to 10 minutes..

I tried replacing the switch, which helped..

My 2005.5 climatronic has had no delay and is ice cold for Texas..different compressors I bet..


sounds like what happended after my switch change....
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Old July 1st, 2011, 18:57   #33
ccisney
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its worth a shot, do you know what low side pressure should read?
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Old July 2nd, 2011, 04:20   #34
DanG144
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If everything is working right the low side pressure will be about 30 psig. It can range from 17 to 40 or so. At 17 you are in danger of icing up your evaporator, at 40 you are wishing it was colder.

When the compressor is off, the low side pressure will equal the high side pressure, call it 100 psig or so. The actual pressure depends upon the temperature.
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Old July 2nd, 2011, 08:21   #35
ccisney
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yeah so everything is running fine, but then I go and try and let some out cause I think I have over serviced, now the fans kick on but right back off and my ac will not kick on no matter what, so then I put in anouther bottle but use 150 cause there out of 46, and nothing, tried a big bottle of the 134 but the bottle was malfuntioned, so now I dont even know if i fixed the delay, i was thinking i had. any suggestions?

Last edited by ccisney; July 2nd, 2011 at 08:24.
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Old July 2nd, 2011, 09:01   #36
Dunno513
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Quote:
Originally Posted by DanG144 View Post
You lose the refrigerant to add the oil, so it costs about $40 or so to try this.
Not if you use one of those fancy inline oil injectors... just push it in with a shot of R134a.. and presto...
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Old July 2nd, 2011, 09:22   #37
ccisney
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cant get fans to come back on, not sure if Im low pressure,,,
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Old July 2nd, 2011, 10:37   #38
DanG144
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Quote:
Originally Posted by Dunno513 View Post
Not if you use one of those fancy inline oil injectors... just push it in with a shot of R134a.. and presto...
How can you safely add oil? You cannot afford to get a slug of liquid oil into your compressor - it does not compress well.

I have never looked into this, and never been trained on auto HVAC.

Time to do some homework.
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Old July 3rd, 2011, 09:44   #39
ccisney
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got system drained and serviced at jiffy lube. Fans and ac back on but seems to be a few degrees warmer, delay is back stronger than ever. Want to add anouther bottle of the pg 46 oil but autozone is out, they have some p 100, 150 stuff I think with oil and ice in the oz bottle? Any thoughts on just adding a bottle of this stuff?
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Old July 3rd, 2011, 10:49   #40
DanG144
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I would resist the temptation.

How much oil did Jiffy lube put back in with the refrigerant?

You do not want to add more refrigerant to a fully charged system.
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Old July 3rd, 2011, 11:47   #41
ccisney
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not sure, didnt really ask...I have no idea. Really want to get oil in there some how, I dont want to do the same thing I did last time though and undercharge my system disabling my fans only to not be able to charge the system back again by myself. Could get costly. Maybe Ill look for some shade tree type that can do an oil/add type balance. ALso, how picky should I be on oil. Should I get the 46? or is the 100 fine if I used that?
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Old July 3rd, 2011, 16:36   #42
DanG144
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I do not know the impact of using the other oils.
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Old July 4th, 2011, 11:05   #43
bds1959
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I'm experiencing the same thing with my 06 Jetta w climatronic - the a/c works great when I'm moving - I've driven in 90-degree-plus heat and had to turn the a/c down! However, at the same time, it seems to take varying amounts of time to cool-down - from a minute or two to maybe 5-10 minutes - I haven't been able to pinpoint a rhyme or reason - also usually barely works when at idle and/or sitting in traffic. Just really ODD! Bottom-line is that the ac does work, however, something just doesn't seem "right..." ???
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Old July 4th, 2011, 13:13   #44
DanG144
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The delay is tough.

The warming up at a stop is almost certainly your fans not working.

Both fans should be running at the same speed. Check them at a time when your AC has been working well while driving, then stop and check them at an idle.
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Old July 8th, 2011, 19:57   #45
DSM1
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We also have an 06 Jetta with a "slow to cool AC". Gauges show a delay in the compressor pumping. Cools OK after a few minutes and then shows a normal low side pressure which leads me to think the problem is a control issue.

Where is the high pressure sw (PWM sender) located and is there a way I can check it with a o-scope?

Last edited by DSM1; July 8th, 2011 at 20:06.
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