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  #1  
Old 04-18-2006, 03:51 PM
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Join Date: Jul 2003
Location: Ocean Isle Beach, NC
Posts: 2,463
AC question/Steve et al

Got the warm left/cool right AC problem with my 210 chassis. I am assuming that I may be low on refrigerant. Below are the diagnostics I just did. Would someone please verify this for me? When I do recharge, can I just use the high pressure indicator on the climate contol unit to monitor the pressure, hook up the new refrigerant to the low side and stop when I reach the appropriate pressure? Can someone post the appropriate pressure/temperature curve for me to follow please?

cold engine/ warm engine/
not running warm & idling
1 75 87
2 71 73
3 75 66
4 73 53
5 75 67
6 76 166
7 4 bar 11 bar
57 psi 156 psi
8 73 121

Thanks.

Len
'99 E300TD 90,000 miles

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  #2  
Old 04-18-2006, 03:55 PM
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Oh, and the error codes I found were
B1416 - coolant circulation pump
B1459 - series interface (K2) connection to instrument cluster
Also had an "FF" - not sure if that means anything.

Len
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  #3  
Old 04-18-2006, 04:01 PM
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Location: Gainesville FL
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Pressures are too low and evap temp too high. Only proper way to charge is to weigh the refrigerant.
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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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  #4  
Old 04-18-2006, 04:46 PM
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Join Date: Feb 2001
Location: jErZeY
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Did you use to have a problem with your AC before?
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96' E320
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  #5  
Old 04-18-2006, 07:04 PM
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Location: Ocean Isle Beach, NC
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To Ron - Yes, three years ago I replaced the temperature sensor indicated by #5 in the diagnostic tests above. Since all the temperatures are basically equal on a cold engine, I assume all the sensors are okay. Last time #5 was way out of whack. Have never had to add refrigerant to the system yet.

To Steve - so an addition of refrigerant is out of the question? Must I evacuate and start from square one?

Len

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