Question about 2001 Mercedes-Benz S-Class

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I had the coolant refilled and now the compressor fans are not working

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Radiator fan only working when the coolant temp over 90 degree check coolant temp on your instrument display using multifunction switch left side group on steering wheel get it hot over 90 degree and have a look is the fan working or not if not check fuse for radiator suction fan fuse chart in boot on the spare wheel with tools and fuse .

Posted on Oct 14, 2010

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Posted on Jan 02, 2017

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4 Answers

Ok I have replaced the therm,coolant temp sensor and replaced the 40amp fuse the keeps blowing,causing coolant fans to not work,causing overheatin. It does fine,fans work and no overheating until I turn on...


If the A/C is on the same circuit as the coolant fans, then the A/C motor is going bad and drawing too much current. A local shop should be able to test the motor for a small fee, or, if you know how to use a multimeter, you can check the motor's resistance for shorts. You'll need to know the original motor specs before testing; the motor model #, maker, etc., should be somewhere online, or available from the maker.

Jun 13, 2014 | Cars & Trucks

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2000 mazda 626 wont blow cold air i have replaced compressor dryer and flushed the system and reinstalled new freon any ideas


There is a valve that stops hot coolant from entering the heater box. It is probably stuck open. murf427

Aug 29, 2012 | 2000 Mazda 626

1 Answer

Refilled 97 jetta ac to capacity it cycles compressor on off remove some runs continous never gets cold


check high pressure with a proper machine and see how many bar you have ,think compressor may be on the way out .

Nov 10, 2017 | 1997 Volkswagen Jetta

1 Answer

Why wont my A/C Compressor and High Coolant Fans Engage?


Check for broken wiring, blown fuses, possible bad relays, and look at the pressure switch. Some systems have a high pressure switch (some have a low pressure also) that prevent the compressor from running. If it is faulty or damaged, it could be preventing the compressor from running. Wire damage could be possible with front end damage.

Apr 09, 2017 | 2001 Cadillac DeVille

1 Answer

1998 Chevy Prizm A/C and Cooling Fan Problems


Compressor could not work without cooling fan comming on.
Check compressor mounting bolts and belt placement on pulley regarding the noise.
But before we get to the a/c system repairs its important to have a properly working cooling system.

Is the car overheating ? It should if neither fan works.
If I recall correctly the fan switch is usually on the upper radiator hose coupling.
you may want to test the fan(s) its self. Remove the electical connectors fron the fan(s) , fabricate a set of jumper wires and run it from the battery. If this works the fan(s) are ok . If it doesn't replace the ones that don't work.
The coolant switch aka fan switch is usually tested with an ohmmeter . Use shop manual for testing procedure.
Test the a/c fan and engine cooling fan relays. (see shop manual for details)
Then I would start looking at coolant( correct mixture and thermostat2_bing.gif) although the thermostat is not likely to cause this.
If all of this still doesn't correct the problem it may be the ECU that monitors this system it may not be responding to the signal /voltage from coolant temp sensor to turn on the fan, (again nedd shop manual to test this)
Once you have a properly working cooling systemnow you can turn your focus on the a/c. Compressors either work or they don't.For you safety I recommend having the a/c system serviced by a ASE certified Technician or a tech's who legally can perform a/c service. Good luck

Nov 27, 2009 | 1998 Chevrolet Prizm

2 Answers

My air condition works only when I?m driving, so when I?m idle you can hear it shut off and on as it starts to blow hot air, then the car starts to over heat.


get you A/C checked! It sounds like you may need to refill your unit with freon.also your A/C cooling fan could not be working properly.When you use your A/C the fans work differently than when you dont use the A/C.Also check your coolant level when your engine is cold,never HOT!

Jul 23, 2009 | 1999 Chevrolet Cavalier

1 Answer

Replaced bad AC unit with floater pully, now no heat, overheating


most likely when you replaced coolant line and refilled rad the system was not bled properly.
fill the system with 50/50 again and top up the reservoir. run the engine to 2000 rpm and look at temp gauge . it should rise to middle and drop to low this means t stat opend and air is out now let engine idle and top up coolant. good luck

Jan 27, 2009 | 1996 Buick Regal Olympic Gold

3 Answers

Overheating


are your electric fans coming on to cool radiator

Aug 02, 2008 | 1996 BMW 318

1 Answer

AirFlow stopped working on E39 1998


  1. check your fan belt, if your fan belt is in the normal position and no problem.
  2. check your compressor and also check the clutch, it is locate right in front of the compressor, when you turn on your air conidition, the clutch should be turn with the fan belt. If it is not, that means your compressor had problem.
  3. check fuse.
  4. check the freon small flow window see if the lique bubbling too much, if it is means you need fill up R-12 freon.
  5. you probably can not do it yourself, in case if you need freon and your compressor is completely empety, you need a special tool to **** the air out first and than fill up freon.
  6. if your air condition is leaking,and you have to fill up a can of special check leaking freon with red colour first, until you find the leaking parts, fix it then you can fill up freon

Jul 02, 2008 | 2008 BMW 528i Sedan

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