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Old 02-21-2010, 06:10 PM
gary560sl gary560sl is offline
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Join Date: Feb 2010
Location: Spring, TX
Posts: 17
Climate Control Unit Fault or Blower Control Module Fault?

I have an '87 560SL with climate control issues. The blower does not work at all. When driving I can feel hot and cold from the vents corresponding to temp setting but I have no blower fan at all. I have eliminated the blower unit as it works fine with 12V directly applied to the terminals on the firewall socket. I have the Mercedes workshop manual CD for the car and yesterday I ran through the climate control check procedure and have concluded it is either the push button unit in the dash or the blower control unit behind the glovebox. The procedure says it could be either unit, which is not much use to me. Does anybody know of any checks I can carry out to determine which unit is at fault?
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