Question about Mercedes-Benz 190-Class

1 Answer

Aux fan not cutting in when o/heating 1989 190E 2.6Ltr. Fans operate when tested.

Both fans operate when tested but eng. aux. fan won't cut in when o/heating.

Posted by on

  • James Park. Feb 25, 2012

    Viscous fan is O.K. Aux fan should come on with-out a/c operating.
    Have had temp. right up on scale when testing.
    Does aux fan operate with-out a/c?
    Fans are wired seperately!

  • James Park. Feb 25, 2012

    Need to know if aux fan operates when eng o/heats (repeat ENG. aux fan not a/c fan)
    Both fans in front of radiator are wired independent of one another .

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Vice President:

    An expert whose answer gotĀ voted for 100 times.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Mercedes-Benz Expert
  • 166 Answers

Your vehicle should have a viscous fan clutch for controlling the engine temp from overheating. The auxillary fans in front are used when the a/c is on. I would start by spinning the engine fan or viscous fan by hand when the vehicle is off. The fan should show resistance when you spin it. If it doesn't and it just free spins then the viscous fan clutch is bad. Let me know what happens when you spin the engine fan and also exactly how high does the engine temp get. Does it reach the red mark?

Posted on Feb 23, 2012

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
greg_margo
  • 1959 Answers

SOURCE: i have an 03 grand

Based on limited information so far, it sounds on the surface to be the TPS (throttle position sensor). This component controls the idling speed of the car under all conditions (cold, warm, AC turned on). Unfortunately, the component is purely electrical and the only way to repair it is to replace it.

Posted on Jun 20, 2011

traceylewis1
  • 363 Answers

SOURCE: 1989 SUNDANCE 2.2 WILL NOT STAY RUNING WHEN TEMP.

Just a shot in the dark, But did you or some one else remove the thermostate?
If so put a new one in this will let the car run fine in the summer but cold weather the car cant get warmed up.

Posted on Nov 28, 2010

lesabre1972
  • 474 Answers

SOURCE: engine cooling fan wont work

check the temp sensor on the engine for the cooling fan.It should be around the thermostat housing or on the side of the head.

Posted on Feb 07, 2010

  • 1 Answer

SOURCE: MERCEDES 190E AUTO.1993,CUTS OUT WHILE

I had a similar problem on my 190E 2.3 1992.
I solved it replacing the relay multi use with 5 pin connection. It's cheap and probably will resolve it.

Posted on Jan 23, 2010

roniecon
  • 6826 Answers

SOURCE: ac not working cuts on and off when aux fans turn

i assume u r refering to the cooling fans,,, if this is so the freon is low ,fans come on and lower the high side ,there fore lowering the low side and the low side switch cuts it off and on,,charge it up

Posted on Jun 30, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1999 land rover discovery auxiliary fan won't work


the auxiliary fan switch on the radiator pipe just above the thermostat unplug it and try to get power to the part that plugs in to the aux switch it if the fans switch on its your switch

Aug 04, 2012 | Land Rover Cars & Trucks

1 Answer

Cooling fan problems


Hi Dave the ECU receives messages from sensors, one of which is a temperature sensor. When the sensor responds to a temp higher than the normal operating temp the fans are then and only then supposed to operate. They will switch in for a brief period and then turn off again. The idle speed is in direct relation to the cold start up idle requirements and specifications. When the engine is cold the idle speed will automatically increase and as the engine achieves operating temp, the idle speed will decrease inthe way you have recorded. If you start the engine and allow it to idle until normal temp is achieved the fan should cut in. The way you've desribed all systems are A okay!. Regards John

Mar 29, 2012 | Pontiac Montana Cars & Trucks

1 Answer

Radiator fans won't shut down


The fans are controlled by the Engine Coolant Temperature sensor mounted in the coolant hose at the top front of the engine. Disconnect the electrical connector and see what happens. Fans should not run. If that cut the fans off replace the ECT sensor.

The ECT sensor provides input to the Engine Control Module which controls the radiator fan ...Its usually the center sensor connector thats Grey..

Aug 06, 2011 | 1996 Jaguar Xj Series

1 Answer

Cooling fans on aztek no coming on, ran hot wire to fans and works. checked fuses, jumped wires at temp. sensor and fans ran after shutting ignition off for aprox. 30 seconds, replaced temp. sensor and...


there are 4 steps to check and you've mentioned all but one the relay which cuts the fan on'off. At an elec shop you check in this order power to fuse block, fuse & output side, temp sensor, relay, and fan motors. Get a new relay

Apr 28, 2011 | Pontiac Aztek Cars & Trucks

1 Answer

1999 dodge grand caravan over heats when sitting still or driving in traffic. We have replace the colling fan relay twice. The fuse it good, all fans do work. Any ideas?


do the fans actually cut in? the relay is operated by a switch on the motor, either the switch is bad or more likely the wiring to it has corroded.

Apr 25, 2010 | 1999 Dodge Grand Caravan

2 Answers

Cooling fans dont work


check for cooling fan relays

Dec 26, 2009 | 2002 Chevrolet Impala

3 Answers

1996 Chrysler T/C over heats


It takes a while for the fans to turn on. If not, it could be faulty temp sensor or fan relays which can be found by tracing the wires from fan motor.
I also recommend changing the thermostat and using a 50/50 coolant mixture. A thinner oil is also better at keeping the engine cooler. Same with synthetic oil

Aug 14, 2009 | 1996 Chrysler Town & Country

4 Answers

Does both fans need to run with a/c on if so what sensor controls the cooling fan its only comes on when engine heats up then cuts off when it cools the engine gets hot the a/c starts cutting off till it...


Yes both fans need to run while the A/C is running,this is because the A/C compressor puts a good amount of added load on the motor and heat is generated when the refrigerant is compressed.There should be a A/C fan relay under the hood in the secondary fuse/relay box,it has probably gone bad,if you have a shucks/kragen or autozone in your area they will test the relay for you.

Jul 01, 2009 | 2000 Honda Civic

1 Answer

Ac not working cuts on and off when aux fans turn on. what could be the problem?ac was working fine, now it blows really low cold air then blows hot air.


i assume u r refering to the cooling fans,,, if this is so the freon is low ,fans come on and lower the high side ,there fore lowering the low side and the low side switch cuts it off and on,,charge it up

Jun 29, 2009 | 2002 Nissan Sentra

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

384 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

yadayada
yadayada

Level 3 Expert

76630 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...