|
|
|
|
|
#1
04-19-2010, 06:39 AM
|
|||
|
|||
|
400E Aux fans
When I jump the connectors of the temperature switch on my 1992 400E so that the aux fan would come on all the time, the A/C doesn't work.
The moment I remove the jump, the A/C comes on. Is this normal. On my 300E, I jumped it and had no problems. Car is not overheating, but with summer coming up, I just wanted the additional cooling to keep the temperatures in check in stop and go traffic. Also, the aux. fan doesn't come on when the A/C is on - how ever long the A/C runs. Can I jump the pressure switch to get the fan to come on (though it will be at low speed). Thanks.
__________________
1986 300E (3/2002) Rear ended and totaled (10/2009) 2000 Xterra (5/2000) 1992 400E (11/2009) -Sold 1986 300E (12/2009) - Sold 2004 E500 Wagon (6/2013) - Sold 
|
|
#2
04-19-2010, 06:49 AM
|
||||
|
||||
|
Probably not a good idea to jump the switch to keep the fan running on low all the time. The wiring may be undersized for constant operation.
__________________
1988 California version 260E (W124) Anthracite Grey/Palomino Owned since new and still going strong and smooth MBCA member Past Mercedes-Benz: 1986 190E Baby Benz 1967 230 Inherited from mom when she downsized 1959 220S Introduced me to the joys of keepin' 'em goin' There are only 10 kinds of people in the world--those who understand binary and those who don't
|
|
#3
04-19-2010, 08:26 AM
|
|||
|
|||
|
in 1992 when the 400e's came out we had several problems with the aux fans.
ON some cars there wes even a recall for the pre-resistor & wiring. I would make sure the wiring to that resistor isn't melted!
__________________
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
|
|
#5
04-20-2010, 02:02 PM
|
|||
|
|||
|
Thanks for the replies.
But, will/should the A/C cut out when the Aux fan comes on at high speed?
__________________
1986 300E (3/2002) Rear ended and totaled (10/2009) 2000 Xterra (5/2000) 1992 400E (11/2009) -Sold 1986 300E (12/2009) - Sold 2004 E500 Wagon (6/2013) - Sold
|
|
#6
04-21-2010, 04:16 PM
|
|||
|
|||
|
A/C shouldnt cut out but when you jumper the leads it reads a short so yes A/C may cut off. If you read the posts on benzworld.org and here about coolharness you should see some of the same issue. Too much or not enough resistance from that sensor and for safety the A/C shuts off.
|
 |
| Bookmarks |
|
|
Linear Mode
