AC Problems
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Your ecu
and ccm are both cooled by a fan that draws air from behind the glove box. Maybe that is what you are hearing, in which case it is not related.
Sounds like your blower is dead.
is the ec light on?
is the compressor turning?
Sounds like your blower is dead.
is the ec light on?
is the compressor turning?
Junior Member
Joined: Jul 2009
Posts: 37
Likes: 1
From: Texas
1997 E420
AC stops in neutral?
I'm wondering if this is normal.
I have a 1997 e420, sometimes when I'm at a red light that I know will take a long time, I just put the car in neutral, but i notice that it no longer blows cold air when I do that.... why?
I have a 1997 e420, sometimes when I'm at a red light that I know will take a long time, I just put the car in neutral, but i notice that it no longer blows cold air when I do that.... why?
Newbie
Joined: May 2009
Posts: 10
Likes: 0
From: Hong Kong
2000 E320 RWD
It is not normal. You can try this, when in neutral, rev it to 1000-1500 and see if the air is cold again. If it does, it could be due to low freon, a failing compressor, or slipping belt in general. You need to do a full diagnostic and pressure measured on both high/low pressure port to be sure.
Newbie
Joined: Aug 2009
Posts: 1
Likes: 0
99 E55 AMG
AC questions
Hey everyone, I'm new here. We just picked up a 99 E55 and I'm slowly working on the little things that need to be fixed. I bought it for my wife but so far I really like driving it. Its quite a step up from her Saturn Ion.
First was the A/C control since the display was impossible to read. I found one on ebay and replaced it no problem. Found the procedure to erase all the DTC codes from the previous vehicle it was in and I have one remaining.
I don't remember the code number now (maybe B1417??), but it is for the left duovalve. This makes sense since the drivers side vent to the left of the steering wheel only blows hot air. I found instructions for cleaning it out but still having the same results. I also ran the diagnostics which tell me my refrigerant is probably a little low. I have the hissing sound and something about the temperature in #5 was lower than expected. So I know I need to add some refrigerant. Is it possible this will fix the duovalve problem? I cleaned out both plungers from the duovalves with carb cleaner and put vasoline on the lower parts as I found instructions for somewhere on the internet.
Also, I opened the duovalves before the car was cooled off enough and ended up losing a bunch of oil to my garage floor. What do I use to replace this and where does it go?
Thanks for your help
First was the A/C control since the display was impossible to read. I found one on ebay and replaced it no problem. Found the procedure to erase all the DTC codes from the previous vehicle it was in and I have one remaining.
I don't remember the code number now (maybe B1417??), but it is for the left duovalve. This makes sense since the drivers side vent to the left of the steering wheel only blows hot air. I found instructions for cleaning it out but still having the same results. I also ran the diagnostics which tell me my refrigerant is probably a little low. I have the hissing sound and something about the temperature in #5 was lower than expected. So I know I need to add some refrigerant. Is it possible this will fix the duovalve problem? I cleaned out both plungers from the duovalves with carb cleaner and put vasoline on the lower parts as I found instructions for somewhere on the internet.
Also, I opened the duovalves before the car was cooled off enough and ended up losing a bunch of oil to my garage floor. What do I use to replace this and where does it go?
Thanks for your help
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Duo valves
have coolant running through them not oil. Just replace 50/50 mix coolant to proper level.
Did you run the diagnostics and post the values 1-8 and the error codes and then erase the codes?
Post them when you got them
Did you run the diagnostics and post the values 1-8 and the error codes and then erase the codes?
Post them when you got them
Newbie
Joined: Oct 2007
Posts: 12
Likes: 0
From: Australia
E270 CDI
Sorry this may not help, I do have the same problem left side blows hot in my case not the duo valve. Workshop is unable to restore function so I blocked the left side duo valve opened the cap and inserted a spring to keep the cone firm in its seat. One day pehaps my worksop will find a cure.
You may check the duo valve function by inserting the plug left to right you would have cut the little tag on the plug it prevents insertion.
If the left side still blows hot the problem is the valve, if not you have the same situation I have.
No codes for me to help mine is not the computer version.
You may check the duo valve function by inserting the plug left to right you would have cut the little tag on the plug it prevents insertion.
If the left side still blows hot the problem is the valve, if not you have the same situation I have.
No codes for me to help mine is not the computer version.
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Member
Joined: Dec 2008
Posts: 202
Likes: 3
From: San Diego, CA
W202 C55 (5.4 swapped C43)
AC not blowing
Hey everyone
When I turn on my AC even at full blast almost no air is being pushed out. If I put my hand up to the vent I can feel that there is very cold air coming out just not hard enough feel even a few inches away from the vents.
Does anyone know what may be causing this problem?
Thanks
When I turn on my AC even at full blast almost no air is being pushed out. If I put my hand up to the vent I can feel that there is very cold air coming out just not hard enough feel even a few inches away from the vents.
Does anyone know what may be causing this problem?
Thanks
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Newbie
Joined: Dec 2007
Posts: 8
Likes: 0
From: Central Connecticut
'97 Mercedes-Benz E420
No warm air from center vents....
Check the diagram in post #17. No warm air from the center vents. This is how the car is designed. If you have full warm air from the center vents, you may have a flap not closing all the way.
MB in Germany told me they don't want warm air from the center vents that can be directed to the drivers face causing drowsiness.
MB in Germany told me they don't want warm air from the center vents that can be directed to the drivers face causing drowsiness.
Member
Joined: Oct 2006
Posts: 162
Likes: 2
German
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Check again
https://mbworld.org/forums/attachmen...console-14.jpg
The center vents get warm or cool air.
The mechanic does not no what he is talking about.
The center console gets its heat or cooling from the center vents also.
If you direct the air flow with the directional arrows towards your face and have the heat on you get heat from the center vents,not the same velocity but heat never the less.
Car is running now warm air out of center vents
Where these factory guys come up with Germans don't want heat coming out of the center vents and where do we come up with members that believe that
The center vents get warm or cool air.
The mechanic does not no what he is talking about.
The center console gets its heat or cooling from the center vents also.
If you direct the air flow with the directional arrows towards your face and have the heat on you get heat from the center vents,not the same velocity but heat never the less.
Car is running now warm air out of center vents
Where these factory guys come up with Germans don't want heat coming out of the center vents and where do we come up with members that believe that
Member
Joined: Oct 2006
Posts: 162
Likes: 2
German
although is does say warm and cool at the very last bullet point, take a look at the illustration , letter C has arrows with lines on it = Cooled air,
now look at the center vents same the type of illustrated arrow= cooled air...am i interpreting this right?
now look at the center vents same the type of illustrated arrow= cooled air...am i interpreting this right?
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
The diagram only
shows what was going on at the time.
If you have the ec off and no blended a/c with heat you just get heat,lower volume but heat. If the compressor is on and you have the heat up you will still have heat.
Nothing wrong with my system and other members that have heat and nothing wrong with the diagrams that state center console gets its heat or cooling from the center vent system thus watch out for heat sensitive items in the storage bin when the heat is on and the vent is open in the box.
I warm up the car put my hand in front of the center vents and have warm air.
It does not blow as strong as the side vents but it is warm and it is blowing.
I kid you not.
If you have the ec off and no blended a/c with heat you just get heat,lower volume but heat. If the compressor is on and you have the heat up you will still have heat.
Nothing wrong with my system and other members that have heat and nothing wrong with the diagrams that state center console gets its heat or cooling from the center vent system thus watch out for heat sensitive items in the storage bin when the heat is on and the vent is open in the box.
I warm up the car put my hand in front of the center vents and have warm air.
It does not blow as strong as the side vents but it is warm and it is blowing.
I kid you not.
Member
Joined: May 2009
Posts: 91
Likes: 2
S212 2014 220 CDI
Clicking sound from the a/c
Latelly ive noticed at clicking or tocking sound from the ac, not loud, but some where in the front when the car gets warm, it clicks about once every second.
Anyone familiar with that?
Anyone familiar with that?
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
You sure it is from the a/c and not the MOT
purge valve click click clicking away?
If you look on the drivers side wheel well it is a little black unit with vac hoses going to it and it comes on when the engine is started to pull fumes from the emissions system. Normal sound normal operation.
http://www.benzworld.org/forums/w210...rge-valve.html
If you look on the drivers side wheel well it is a little black unit with vac hoses going to it and it comes on when the engine is started to pull fumes from the emissions system. Normal sound normal operation.
http://www.benzworld.org/forums/w210...rge-valve.html
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
It turns on an off
according to test functions and when fumes build up.
So it does not run all the time.
Don't worrry bout it.If it goes bad rarely it will trip a cel.
So it does not run all the time.
Don't worrry bout it.If it goes bad rarely it will trip a cel.
Newbie
Joined: Oct 2009
Posts: 4
Likes: 0
e300 diesel
not hot ???
Well, my 210 E300D has another symtom. I have the cool air out the center vents all the time. With A/C it is cold, and cold air out the side vents. But with the heat coming out the side I have cold air blowing out the center. I do not thinkit is a/c air when the heat is on, but it is not warm at all. Any Ideas out there in MB land? 
MBWorld Fanatic!
Joined: Aug 2003
Posts: 1,138
Likes: 7
From: NY
2014 E550 4matic,, sold 2012 E 350 4matic,,sold 2010 e350 4w,sold 2002 e320 se
"EC" Button stuck on and wont go off??
2 days ago the EC -economy button on the climate control came on and now it stays on..Any of you MB guru's have an idea of what the thing is trying to tell me?
