AC Issues
Thread Starter
Junior Member
Joined: Mar 2008
Posts: 39
Likes: 3
2000 E320, 1997 E420, 2007 E550, 2009 E350
AC Issues
I just replaced the ac compressor on my 2000 E320 with one that I had previously taken off a car my wife totaled. The replacement compressor was less than a year old and had been stored properly for 18 months. I also installed a new receiver dryer along with it. After installing the comp and r/d I pulled a vacuum on the system and let it sit for two hours with no bleed down or leaks. I recharged per spec and reset the ac fault codes, the ac worked perfectly with ice cold air for three weeks. Today I jumped in and took off but the ac didn't blow cold, only outside temp air. Yesterday it worked fine.
Here are the numbers:
The EC light is NOT on.
The AC Clutch will not engage.
The Low Pressure reading while running with ac on is 110 psi.
The High Pressure reading while running with ac on is 150 psi.
The only fault code is E 1419.
Here are the readings with car running in 84 degree heat:
1 100
2 84
3 107
4 107
5 103
6 181
7 07
8 91
9 30
10 4.5
11 2.8
12 4.2
Does anyone have an idea where to start troubleshooting?
Here are the numbers:
The EC light is NOT on.
The AC Clutch will not engage.
The Low Pressure reading while running with ac on is 110 psi.
The High Pressure reading while running with ac on is 150 psi.
The only fault code is E 1419.
Here are the readings with car running in 84 degree heat:
1 100
2 84
3 107
4 107
5 103
6 181
7 07
8 91
9 30
10 4.5
11 2.8
12 4.2
Does anyone have an idea where to start troubleshooting?
MBWorld Fanatic!
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Posts: 6,130
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A gaggle of MB's
I am not saying this is the case - since you did not mention outside ambient temperature - if the outside ambient is not sufficiently above aircon setting - like 5-6 degrees - then the system will not automatically kickin at startup - in this case you have to turn the climate contorl down - or simply turn climate control down to "lo" - to get the system to kick in
Member
Joined: Nov 2013
Posts: 170
Likes: 7
2001 Clk55 AMG
I had a similar issue with my clk. It turned out that the little control valve on the compressor stuck. This basically keeps the compressor from pumping. If you put gauges on both the high and low pressure sides, and they are about the same this may be your problem. This valve can be replaced if the compressor is otherwise healthy.
Newbie
Joined: May 2017
Posts: 6
Likes: 0
E320
Hello.....I'm also having AC issues, my AC just stopped working.....trying to DIY to save a few dollars.
I have a 2000 E320 with approx 125K miles.
The error codes were:
B 1234 Sun Sensor
B 1235 Emissions Sensor
B 1419 Electromagnetic Clutch
Drove car for 30 to 50 miles with AC on max., but it keeps blowing warm air and codes have not reappeared.
One day later I noted the sensor readings as follows:
01 = 84
02 = 89
03 = 87
04 = 85
05 = 85
06 = 181
07 = 08
08 = 102
Are these reading within range, specifically #5, #6, and #7?
I'm hoping a safety feature or something in the AC system just shut off the electromagnetic clutch/compressor and it's not the AC compressor.
I've read online to check the voltage going to the electromagnetic clutch, I've also read online to test electromagnetic clutch with a direct 12 volt.
Can the electromagnetic clutch be replace by itself, or does the entire AC compressor need to be replaced?
Any assistance is greatly appreciated.
Thanks,
Art
I have a 2000 E320 with approx 125K miles.
The error codes were:
B 1234 Sun Sensor
B 1235 Emissions Sensor
B 1419 Electromagnetic Clutch
Drove car for 30 to 50 miles with AC on max., but it keeps blowing warm air and codes have not reappeared.
One day later I noted the sensor readings as follows:
01 = 84
02 = 89
03 = 87
04 = 85
05 = 85
06 = 181
07 = 08
08 = 102
Are these reading within range, specifically #5, #6, and #7?
I'm hoping a safety feature or something in the AC system just shut off the electromagnetic clutch/compressor and it's not the AC compressor.
I've read online to check the voltage going to the electromagnetic clutch, I've also read online to test electromagnetic clutch with a direct 12 volt.
Can the electromagnetic clutch be replace by itself, or does the entire AC compressor need to be replaced?
Any assistance is greatly appreciated.
Thanks,
Art
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Newbie
Joined: May 2017
Posts: 6
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E320
So I just rechecked for the error code, non have reappeared, they were B1234, B1235, and B1419 prior to clearing them.
The sensor data/values I just obtained are:
01 = 78
02 = 69
03 = 85
04 = 84
05 = 84
06 = 150
07 = 06
08 = 82
09 = 31
10 = 1.5
11 = 3.9
12 = 4.3
20 = 3.2
21 = 32
22 = 00
23 = 32
24 = 11.6
40 = 164
41 = 85
42 = 40
43 = 136
Is there other data which I need to obtain, if so, can you assist with procedures for obtaining this data?
Thanks again for any assistance......
Art
The sensor data/values I just obtained are:
01 = 78
02 = 69
03 = 85
04 = 84
05 = 84
06 = 150
07 = 06
08 = 82
09 = 31
10 = 1.5
11 = 3.9
12 = 4.3
20 = 3.2
21 = 32
22 = 00
23 = 32
24 = 11.6
40 = 164
41 = 85
42 = 40
43 = 136
Is there other data which I need to obtain, if so, can you assist with procedures for obtaining this data?
Thanks again for any assistance......
Art
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MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
http://www.mercedesmedic.com/ac-air-...le-codes-list/
Follow the comments advise.
Follow the comments advise.
Newbie
Joined: May 2017
Posts: 6
Likes: 0
E320
2000 E320 AC Not Cold
Hello......the error codes/faults have not reappeared (B1234, B1235, B1419), and I noted the following sensor readings:
Early morning, engine cold:
01 = 67
02 = 66
03 = 73
04 = 71
05 = 71
06 = 80
07 = 5
08 = 69
09 = 27
Mid-day, engine cold:
01 = 121
02 = 91
03 = 123
04 = 120
05 = 105
06 = 157
07 = 9
08 = 107
09 = 27
Mid-day, engine running:
01 = 107
02 = 82
03 = 105
04 = 103
05 = 102
06 = 182
07 = 8
08 = 94
09 = 32
I also checked the low-side & high side at 90 degree temp:
Static Pressure, engine off - low side over 120, high side 115
Engine on, AC off - low side 103, high side 115
Engine on, AC on - low side 105, 125 high side
The AC clutch engages, and disengages when the EC is pressed.
Does this mean the AC compressor is bad, or maybe a valve on the compressor?
Trying to familiarize myself with how the AC works......thanks,
Art
Early morning, engine cold:
01 = 67
02 = 66
03 = 73
04 = 71
05 = 71
06 = 80
07 = 5
08 = 69
09 = 27
Mid-day, engine cold:
01 = 121
02 = 91
03 = 123
04 = 120
05 = 105
06 = 157
07 = 9
08 = 107
09 = 27
Mid-day, engine running:
01 = 107
02 = 82
03 = 105
04 = 103
05 = 102
06 = 182
07 = 8
08 = 94
09 = 32
I also checked the low-side & high side at 90 degree temp:
Static Pressure, engine off - low side over 120, high side 115
Engine on, AC off - low side 103, high side 115
Engine on, AC on - low side 105, 125 high side
The AC clutch engages, and disengages when the EC is pressed.
Does this mean the AC compressor is bad, or maybe a valve on the compressor?
Trying to familiarize myself with how the AC works......thanks,
Art
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Double check it as the errors are costly.
AC clutch on and compressor turning, car interior is hot and the climatronic is set to about 70F.
If you read low side 105 and high 125 psi, the compressor is kaput.
Working compressor should pump in high 200's or even 300's
AC clutch on and compressor turning, car interior is hot and the climatronic is set to about 70F.
If you read low side 105 and high 125 psi, the compressor is kaput.
Working compressor should pump in high 200's or even 300's
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Newbie
Joined: May 2017
Posts: 6
Likes: 0
E320
2000 E-320 AC
Thanks all for your insights......it's a work in progress, will need to make the time to get the compressor out.....
Is there a way to test to see whether its the compressor control valve, or the compressor itself?
Thanks again,
Art
Is there a way to test to see whether its the compressor control valve, or the compressor itself?
Thanks again,
Art
