Question about 1998 Mercedes-Benz C-Class

1 Answer

Why does my mercedes c180 '98' only blow air through air vents when i drive the fan does not work? How do I locate problem?

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1 Answer

Check the blower circuit breaker, the blower control fuse, the blower relay, and the blower itself. If the blower does not work on any speed, you will likely find that the control fuse has blown.

Posted on Jun 11, 2014


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Posted on Jan 02, 2017

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SOURCE: a/c fans wont blow

If the fuse is blown for the blower then there is a short, that is not an answer, go to the blower and check to see that the blower motor connector has 12 volts to it when the blower is set to high speed on control, if it does then u need a new blower motor, if it doesn't then the control switch is defective or the blower motor speed control resistor is defective.

Posted on May 13, 2009

  • 203 Answers

SOURCE: vents blowing hot air while driving

hello I'm an M.B. tech, sorry I thought I sent this yesterday but it is not in my solution box. If your vehicle is actually blowing hot air and not just ambient ait through the vents the only reason this could be is that coolant is entering the heater core all the time. Mercedes had 2 ways of doing this from that era. The earlier version had a vacuum water valve against the rear firewall. The other version had an electric valve called a mono valve by the battery tray. I would think it would be very likley to knock of a vacuum line doing an oil change but most likley you would have other problems as well. The water valve had a red vac, line going to it. Your vehicle probably has the electrical valve which is ublikley to get damaged during an oil change. most likley the diaphram is ruptured. There are 4 slooted screws on top of the valve. If you remove those screws you will gain access to the insert(plunger for solonoid). Take the rubber seal and stretch it out. Take a close look for tiny tear in seal. It is a very common problem with the monovalve type system. You can replace just the insert and it saves alot of money as compared to the price of the monovalve. hope this is helpful.

Posted on May 23, 2009

  • 321 Answers

SOURCE: 1994 c280 mercedes benz a/c

center console unit has a vaccum leak.
do you hear the vaccum pump in the trunk cycling over and over?
take it to benz for service very very difficult to fix.

Posted on Jun 12, 2009

  • 42 Answers

SOURCE: I have a Mercedes E320 4 DOOR,1994. When I turn on

Try closing the windows, the AC on some Mercedes require all windows to be closed for the side vents to work.

Posted on Sep 12, 2009

  • 6 Answers

SOURCE: mercedes w202 heater control unit not responding

one of two things
most common is the vacuum regulator is faulty

or secondly
the electronic climate control (or controller)

Posted on Sep 25, 2009

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I drive c240 2005, when i turn the front glass fog air blow on, it give loud noise and now air comes out, it seems that pips are blocked somewhere.. NOT SURE WHAT TO DO

Do you mean that the air does not come out of the vents at the bottom of the windshield?

This could be as simple as a vacuum leak or a broken leaver somewhere in your dashboard. I'm a big fan of fixing it yourself but I think this one is going to be easier for a dealer to fix.

Mar 31, 2014 | Mercedes-Benz C-Class Cars & Trucks

1 Answer

97 Mercedes 250 td. Question is the climate control is not working right. If you set to cool (air con ) and turn the fan up to full it sounds like its on, but even if you put your face to the vents it has...

Blend door issue? Is there air blowing any where else like floor or at your feet? I would start there. If you have air elsewhere, then your issue is blend door. May sure the flow of air moves as you change the setting.

Jul 02, 2017 | 1997 Mercedes-Benz C-Class

1 Answer

A/C not working in my 2003 Nissan maxima GLE-- the gauges light up appropriately, but the fan doesn't blow. It does get cold, I can feel the refrigerated air gently blow though the vents if i'm driving...

The most likely cause of your concern would be the fan control amp. It is located behind the glove box. It controls the ground side of the blower motor. But before replacing it, check to see if you have power and ground at the blower motor.

Jul 22, 2009 | 2003 Nissan Maxima

1 Answer

Car is blowing air while running after 30 m

either a vent door actuator is failing or vacuum,,,or the ac is heating up cause of resricktion in ac system ,or fans are not working and ac is heating up

Jul 03, 2009 | 2008 Mercedes-Benz Mercedes Benz C Class

1 Answer

A/c doesn't blow unless high speed

Its your blower motor. Check the strip fuse (30 amp) outside the fuse box in a tootsie roll sized clip case by the strut mounts. In between the fuse box and strut mount. If not you may need a regulator or new blower motor.

Jun 05, 2009 | 1992 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Hot air comes out of defrost vent at top dash and cold air out of

Hey, what setting is your A/C on Max AC? AC? Cycling air in vehicle or taking it from outside

The car icon on the right in this image is what I'm referring to when I say cycling air in vehicle.

Also, do you ever have cold air blowing? on any setting or any speed? if not, find your A/C fan, it is smaller the the engine cooling fan, sometimes there are 2 fans together. The AC fan should be located at the front of the vehicle and is usually electrically powered.

Also try to find your compressor, looks something like this:

is it running? is one pipe hot and one cold? (the pipes I am referring to are inlet and outlet pipes of the A/C compressor unit.)

Hope this helps, keep me posted

May 10, 2009 | 1994 Mercedes-Benz E-Class

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