The van is not blowing ICE COLD AIR. It's blowing 68F, not cold. It was
COLD when it was new in 1997.I hooked up the guages, and read low side
of 28 and high of 160 at 1600-2000 RPM. Does it need more refrigerant, have
too much, or is something else wrong? Ambient temp is 104F.
Also, after some
High side should be in the 240 psi range for that OAT.
104(OAT)x2+32
Russ W.
On 7/29/2012 15:14, OK Don wrote:
The van is not blowing ICE COLD AIR. It's blowing 68F, not cold. It was
COLD when it was new in 1997.I hooked up the guages, and read low side
of 28 and high of 160 at 1600-2000 RPM.
So, add more R134a?
On Sun, Jul 29, 2012 at 4:00 PM, Russ Williams rawil...@eatel.net wrote:
High side should be in the 240 psi range for that OAT.
104(OAT)x2+32
Russ W.
On 7/29/2012 15:14, OK Don wrote:
The van is not blowing ICE COLD AIR. It's blowing 68F, not cold. It was
COLD when
The chart at http://dodgeram.org/tech/repair/HVAC/R134a.htm says 135 psi. ?
? ? ?
The calculator here says 134 -
http://www.csgnetwork.com/r134apresstempconv.html
My pressure is higher ? ? ? ?
On Sun, Jul 29, 2012 at 4:03 PM, OK Don okd...@gmail.com wrote:
So, add more R134a?
On Sun, Jul
I just drove the van, the AC got down to 52F while driving 45mph or so.
Then I took the ML out for fuel, and saw that it got to 37F over the same
route. MUCH more comfortable in the (now) 108F temp.
On Sun, Jul 29, 2012 at 4:07 PM, OK Don okd...@gmail.com wrote:
The chart at
Those are the wrong charts.
Either you've got a leak and lost some of the charge, or your compressor is
about dead.
http://m.instructables.com/id/How-to-Repair-Automotive-AC/step1/freon-check/
From this site, looks to me like you should try adding some more refrigerant.
--
Max Dillon
Interesting! How would one know which R134a charts are right? Any way, from
this chart, my pressures are low, but the center vent temp is about right.
However, the ML's center vent temp is much lower. Makes one question ALL
the charts!
For vehicles currently running with freon R-134a only
On Sun, 29 Jul 2012 19:11:35 -0400 Max Dillon meadedil...@bellsouth.net
wrote:
Those are the wrong charts.
Either you've got a leak and lost some of the charge, or your
compressor is about dead.
http://m.instructables.com/id/How-to-Repair-Automotive-AC/step1/freon-check/
From this
Are different oils used with R134a systems? If so, which does Mercedes use?
-Dave Walton
On Jul 29, 2012, at 7:38 PM, OK Don okd...@gmail.com wrote:
Interesting! How would one know which R134a charts are right? Any way, from
this chart, my pressures are low, but the center vent temp is about
Yes, question them, they are really just a guide. I agree that these center
vent temps from the chart I posted are hooky.
When I bought my first AC gauge it came with a chart, and it largely agrees
with the car-specific charts for my Mercedes and our Infiniti.
--
Max Dillon
Charleston SC
'95
On Sun, 29 Jul 2012 18:38:09 -0500 OK Don okd...@gmail.com wrote:
Interesting! How would one know which R134a charts are right? Any way,
from this chart, my pressures are low, but the center vent temp is
about right. However, the ML's center vent temp is much lower. Makes
one question ALL the
Yes, Mercedes 124 calls for a low viscosity oil, someone here posted it last
summer. I think the viscosity is determined by the compressor.
Then there is the mineral oil versus PAG oil debate...
--
Max Dillon
Charleston SC
'95 E300
'87 300TD
Dave Walton walton.d...@gmail.com wrote:
Are
Does oil escape with a leak or is it left behind? In other words - can I just
add refrigerant or do I need to add oil as well?
-Dave Walton
On Jul 29, 2012, at 7:58 PM, Max Dillon meadedil...@bellsouth.net wrote:
Yes, Mercedes 124 calls for a low viscosity oil, someone here posted it last
Well, it seems that you have to be smart enough to know how to read the
gauges! The outer ring of numbers is labled R134a and is green. The next
inner ring is black, and labled psi. Turns out that the green ring
corresponds to the pressures on the charts I referencd, while the black psi
numbers
Oil escapes, oily spot will mark the leak...
--
Max Dillon
Charleston SC
'95 E300
'87 300TD
Dave Walton walton.d...@gmail.com wrote:
Does oil escape with a leak or is it left behind? In other words - can I just
add refrigerant or do I need to add oil as well?
-Dave Walton
On Jul 29, 2012, at
Some of the confusion stems from the fact that R12 has the same
temperature and pressure on the low side (that is, in degrees F, 32
psi = 32 degrees). One of the reasons R12 was used in automobiles was
that it's simple to see what the evaporator temperature is.
R134a doesn't work like
There is no debate about using mineral oil with R134a, it's not a good
idea at all unless you want a new compressor soon -- it's not soluble
in R134a and circulates poorly.
Your choices are PAG or Ester oil, either of which work fine.
Nipondenso requires PAG, don't remember the viscosity
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