Why does my AC blow colder on passenger side then driver side?
MBWorld Fanatic!
Joined: May 2010
Posts: 1,027
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05 E55 AMG, E320 CDI, Turbo E46 M3,IS300 2JZGTE,VQ35 Turbo Maxima, Mercedes 300D
I can hear squeaking from my vents. Sounds like a fan squeak though. Happens once in a while ... after I haven't driven the car in a while. Not valve related is it?
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,461
Likes: 9
From: Treasure Island, FL
GLE 63S
SO I've had the cold air blowing up on the passenger side windshield and with the heat and high hummidity here in Houston of late there's been a condensation line on the passenger side windshield. Haven't worried about it much until yesterday. 103F and air now blows hot air and never cools. Read the temps from the hidden AC menu. 03 - left side heater core = 28 deg Celcius, 05 temp at evaporator sensor - 37deg Celcius and 07 - barometric pressure = 0. I guess I have no FREON... BUT why do you loose FREON???
MBWorld Fanatic!
Joined: Jan 2004
Posts: 7,092
Likes: 13
From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
Could have a pinhole leak anywhere. Condensor or Evap?
Definitely worth popping a can/half to start in see what happens. The car has all kinds of safety settings. Maybe when it dropped low enough, the car shut off the compressor.
Don't forget..NO sealant in the can. Just straight 134a. Have to look close in Autozone aisle, but they are usually on the bottom.
and NO turning it upside down like the old days. Can straight up and down and if the can gets too cold, heat it up a touch with warm water. It will stop flowing if can gets too cold.
Throw in a can and see what happens. If nothing, you spent 20 bucks and larger bills await.
With system on and idling.....go through those numbers again for me from 1-8ish and type out what you find.
Example.
1-23
2-34
3-38
4-45
Always that chance of that valve being stuck open for rear heater.
-Could be a sensor ..evap etc giving false readings and system shutting off.
-always the chance of pinhole somewhere like condensor (just under radiator)
Definitely worth popping a can/half to start in see what happens. The car has all kinds of safety settings. Maybe when it dropped low enough, the car shut off the compressor.
Don't forget..NO sealant in the can. Just straight 134a. Have to look close in Autozone aisle, but they are usually on the bottom.
and NO turning it upside down like the old days. Can straight up and down and if the can gets too cold, heat it up a touch with warm water. It will stop flowing if can gets too cold.
Throw in a can and see what happens. If nothing, you spent 20 bucks and larger bills await.
With system on and idling.....go through those numbers again for me from 1-8ish and type out what you find.
Example.
1-23
2-34
3-38
4-45
Always that chance of that valve being stuck open for rear heater.
-Could be a sensor ..evap etc giving false readings and system shutting off.
-always the chance of pinhole somewhere like condensor (just under radiator)
Last edited by Jakpro1; Aug 9, 2011 at 04:32 PM.
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,461
Likes: 9
From: Treasure Island, FL
GLE 63S
OK so Freon is not low as I got a guage from Autozone and pressure is within expected range.
Readings 1-8 are as follows:-
1 - 40c
2 - 42c
3 - 59c
4 - 37c
5 - 55c
6 - 89F
7 - 3
8 - 61
IS the the sensor?
Readings 1-8 are as follows:-
1 - 40c
2 - 42c
3 - 59c
4 - 37c
5 - 55c
6 - 89F
7 - 3
8 - 61
IS the the sensor?
MBWorld Fanatic!
Joined: Jan 2004
Posts: 7,092
Likes: 13
From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
Man so hard in these friggin cars. We just had a guy on a wild goose chase and it turned out to be nothing to do with AC.
First thing that pops up to me is your #7. That is freon pressure and it is pretty low at 3. The next thing is your evap temp.....#5. That is off the charts at 55c. Holy cow!
Quick note that our AC compressors will spin the crap out of themselves to get you to desired pressure. Its different than US machines. She is running nearly all the time at different speeds. That may be the reason for the pressures testing fine on the gauge.
Here are some other guys readings so you can compare. Evap sensor is cheap to buy....and pain to install.
Keep me updated buddy. Hows the large line where you would normally add freon....she cold at all????
First thing that pops up to me is your #7. That is freon pressure and it is pretty low at 3. The next thing is your evap temp.....#5. That is off the charts at 55c. Holy cow!
Quick note that our AC compressors will spin the crap out of themselves to get you to desired pressure. Its different than US machines. She is running nearly all the time at different speeds. That may be the reason for the pressures testing fine on the gauge.
Here are some other guys readings so you can compare. Evap sensor is cheap to buy....and pain to install.
Keep me updated buddy. Hows the large line where you would normally add freon....she cold at all????
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From: California
04 E55 99 SC400 01 Z06 Corvette
Bumping up a old thread, Is there an amount of oz that are needed for a recharge or does it go by a certain reading on your climate control? Ive read to do a 45 min vacuum, I just added the killer chiller and just have this left to do
