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  #1  
Old 10-22-2000, 11:37 AM
Registered User
 
Join Date: May 1999
Location: Somers, CT
Posts: 73
I have seen postings about the blower
resistor causing problems on the air
conditioning.

How would I know when to replace it?

I have had a couple of situations where
I cut the AC off (that is, push the EC
button) but then the AC would not come
back on until I restarted the car.



------------------
Ralph Burnette
1993 300SD
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  #2  
Old 10-22-2000, 07:30 PM
Registered User
 
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
When the blower regulator fails, the blower will only run on very low speeds.

Your problem sounds like a limp mode.

------------------
Benzmac:
Donnie Drummonds
300E
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM
OWNER OF MB AUTOWERKS .COM
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  #3  
Old 10-23-2000, 06:50 AM
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Join Date: May 1999
Location: Somers, CT
Posts: 73
I don't understand....limp mode"

------------------
Ralph Burnette
1993 300SD
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  #4  
Old 10-23-2000, 07:42 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
"Limp mode" or limp home mode is the term used to describe substitute programming used by various controllers when data supplied doesn't add up.

One example is the coolant sensor on the engine management system: if the readings vary in a way that can't be duplicated in nature (hot one moment cold the next, etc.)the controller substitutes a warm reading and changes many of the rules; such as aux fan operation, compressor control, etc. Older systems would read the temp sensor when it went wrong and the car would stall or run poorly with all the extra fuel that would be used for cold running.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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  #5  
Old 10-23-2000, 07:42 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
"Limp mode" or limp home mode is the term used to describe substitute programming used by various controllers when data supplied doesn't add up.

One example is the coolant sensor on the engine management system: if the readings vary in a way that can't be duplicated in nature (hot one moment cold the next, etc.)the controller substitutes a warm reading and changes many of the rules; such as aux fan operation, compressor control, etc. Older systems would read the temp sensor when it went wrong and the car would stall or run poorly with all the extra fuel that would be used for cold running.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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