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#1
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aux fan
I took the 88 560Sl to dinner tonight - got stuck in traffic - it was in the 90's today in Philadelphia - I noticed the temp was higher than normal -- when I parked, I looked, and the front electric fan was not working -- I can not remember -- does this fan have two speeds -- should it not start when the AC is turned on and then switch to high depending on water temp and or AC gas pressure?
I checked the fuse -- fuse box lists #14 as "Aux Fan" - when I removed this the main interior fan stopped - so the fuse is good Is their another fuse? do they have them both on the same one! Am I correct in the operation of the fan? It is funny, I had the AC converted a few years ago to 134 because the Compressor Manifold failed -- the dealer did the change -- it has worked very well -- this year it is a little week in traffic -- I think now that the fan has not been working for a while -- Anyone with some sugestions - I have never had any trouble with any electrical system in this car. Thanks |
#2
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The aux fan low speed should come on when the A/C pressure reaches 230lbs@sqin.
The high speed is only turned on when the engine reaches 100-105C dependant on color of the aux fan switch.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Do a search on "aux fan" and you'll get a lot of info on this system, including how to diagnose problems.
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Steve '93 400E |
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