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  #1  
Old 04-25-2002, 05:11 PM
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Location: Raleigh, NC, US
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A/C Intermittant Fan

On my 1991 300E, the A/C, Heat, vents, etc. all work - what doesn't is the fan in any speed (Auto, High, Low) on a consistant basis. I've gone full days without the fan working. If I have the temperature set so that the A/C should be on I do feel cold air from the vents just without and fan blowing it out. Other days after driving for differant amounts of time the fan will suddenly start to work and I can then change it to any of the optional speeds. Any hints about where to look for a fix would be greatly appreciated. Gets fairly sticky this time of year in North Carolina and it's only going to get worse.
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  #2  
Old 04-27-2002, 07:17 AM
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The electrical switch at the back of the ignition may be worn. Try playing with the key by turning it a little with the car running. If the blower comes on replace the switch. If that doesn't work it may be the blower motor regulator.

Good luck.
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  #3  
Old 04-28-2002, 02:19 AM
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My car did the same thing. I can safely say (99.9%) that it is your ignition switch.
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  #4  
Old 04-28-2002, 01:46 PM
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You may have a problem with worn out brushes in your blower. I have had mine apart 3 times for the same sort of funky intermittent operation. The regulator was replaced once, which did not cure the problem. If it comes on suddenly when you slam or close a door and you've got it on high or auto A/C, then you've got intermittent contact. I'd take a hard look at the motor itself. It's not likely to get any better with time.
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Old 05-13-2002, 03:08 PM
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the manual seems to describe a procedure that is very DYI. This looks like most of the cost would be for labor. Is the regulator seperate from the blower itself?
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  #6  
Old 05-13-2002, 05:29 PM
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Quote:
Originally posted by Zoni
the manual seems to describe a procedure that is very DYI. This looks like most of the cost would be for labor. Is the regulator seperate from the blower itself?
Yes it is.
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