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2009 routan 3.8 - ac compressor runs constantly - won't cy

Customer Question
cle...
2009 routan 3.8 - ac compressor runs constantly - won't cy cle
Submitted: 2 years ago.Category: VW
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Answered in 16 minutes by:
5/13/2015
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: VW
Satisfied Customers: 16,215
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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Hi, my name is ***** ***** use a variable displacement comressor, and wont cycle like the old ones, it uses the variable displacement to run the correct pressures, does it cool good?
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Customer reply replied 2 years ago
No - that was the problem to begin with - it does have proper charge
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
what are the pressures when running?
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Customer reply replied 2 years ago
40-50 low side - up to 300 high side although pressures do not stay steady at all
Customer reply replied 2 years ago
Currently have idling at 1500 rpm calling for max cold - high pressure seems to only stay up 10 seconds or so at a time
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
are the lines going through the firewall cold at all?
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Customer reply replied 2 years ago
no
Customer reply replied 2 years ago
high pressure hot - low pressure cool (barely)
Customer reply replied 2 years ago
ambient air here only about 65f air out of duct 55 - once in while a bit less
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
yes, but hw about the aluminum lines going the=rough the fire wall, are they cold?
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Customer reply replied 2 years ago
not really - no
Customer reply replied 2 years ago
(That's where tech was checking them before)
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
ok, then you either have a bad expansion valve, or the compressor is bad, when you say the pressures are all over the place, what does the high and low at, when idling?
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Customer reply replied 2 years ago
high pressure goes from 120 up to 300 (doesn't stay up very long) Just constantly going up and down
low pressure from 45 to 60
Customer reply replied 2 years ago
60 and 174 idling right now
Customer reply replied 2 years ago
the 300 only happens 1500-2000 rpm
Customer reply replied 2 years ago
hello?
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
ok, then the pressures are good, and you have a bad expansion valve, the compressor is running the proper pressures, but the expansion valve is not letting it cool,Tim
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Customer reply replied 2 years ago
Sounds reasonable - have one ordered - we'll give it a try in the morning
VW Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
Anytime my friend, please dont forget to rate me so I can get credit for helping, thanks,Tim
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Tim Mohr
Tim Mohr
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