Question about Mercedes-Benz SL-Class

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1994 mercedes SL500 air conditioner will blow cold and work fine for a few weeks and then blows hot or NOT cold for 3-5 days & then will work again for no apparent reason. Is this a switch ?

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Most likely low freon tripping the relay so as not to hurt the compressor. Ambient temp has alot to do with it. Low side should be pegged on the gage when reading with motor off. While running with full a/c at ilde should be arout 50 psi, at 2000 rpms should be at least35 psi. When outside temp drops it will turn the Klima relay off or when pressure drops while running it can shut off. If the pressures are correct the pressure switch on the drier could be bad.

Posted on Aug 15, 2010

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The heater in my 2002 Mercedes ML500 only blows cold air (air temperature) and the AC as well. The middle vent is not blowing at all.


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----


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Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

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These will help.

Thanks.

Feb 15, 2013 | Mercedes-Benz ML320 Cars & Trucks

1 Answer

The heater in my 1999 Land Rover Discovery Series 1 won't blow cold.


As per your problem mentioned.There are few solved help links to troubleshoot these problems.Go through the list and Click the link below:----
Air conditioner blows air but not cold air http://repairhelpcenter.blogspot.in/2012/07/air-conditioner-blows-air-but-not-cold.html

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Car overheats and Air blows hot at idle? http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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Heater blows cold? http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side? http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html---------- Hot air on the driver's side vents only? http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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2005 Chrysler PT Cruiser: A/C Blows Warm? http://whoisbyme.blogspot.in/2012/06/2005-chrysler-pt-cruiser-ac-blows-warm.html

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1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold? http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------
No heat, blower blows only cold? http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

------------
These will help.
Thanks.

Nov 22, 2012 | Cars & Trucks

2 Answers

Air conditioner blowing out hot air?


you will have to get a dye injected into the system or have it checked witha freon probe

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1 Answer

The heater blows cool air


Most heater core control valves are cable operated. A few are vacuum operated. Hot water is not getting into heater core. Valve has to be troubleshot. Less likely is plugged hose lines to heater. If you intend to DIY please get a repair manual at autoparts store. Good luck!

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1 Answer

Intermittent A/C outage


your climate control unit is bad you can get a used one from the salvage yard it should work fine

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1 Answer

Air conditioner blows hot cold and sometimes not at all why?


hello,seem you need to send your car to authorized dealer to scan the problem,maybe the solution is only synchronizing all the flap,ty

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