2004 c200 kompressor will not take freon - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 08-30-2011, 10:40 AM Thread Starter
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2004 c200 kompressor will not take freon

My 2004 C200 kompressor has a slow leak in the air conditioning.
I have just been filling it up with freon when it goes low.
Last time they said they had to program the computer and add freon.

The freon is low again and i want to add freon but now the system will not accept the freon since the compressor will not turn on due to the low pressure switch i assume. I tried bypassing the ac switch without any luck. The switch on the panel shows the ac is off (red led light is on).

Is there some way to get the system to accept the freon without reprogramming the computer.

Regards

Jim
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post #2 of 5 (permalink) Old 08-30-2011, 12:08 PM
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Welcome aboard. Please click user cp and edit details to add your vehicle and location to your profile, it's often useful information when you're seeking assistance.

I have never tried this with a Benz, but I suppose you could apply voltage to the clutch to make it engage; some folks used to do that with GM cars a couple of generations ago (my preference was to bypass the pressure switch). Be sure to purge the line before you connect it, too. Another concern: how much oil have you lost/added?

Also, you posted into the general forum, which as the name suggests is for items of general knowledge/usefulness/information. For specific information about your car, it's best to search and post in your car's specific forum, the W203 forum. Scroll down the main page and you'll see it.

Good luck.

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post #3 of 5 (permalink) Old 08-30-2011, 01:07 PM Thread Starter
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Thanks for the information. Will do as you suggest.

Regards,

Jim
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post #4 of 5 (permalink) Old 08-30-2011, 01:51 PM
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Your car should never, ever take freon.
Those years use R134 refrigerant.
Than assuming you have right refrigerant, your problem is somewhere else. The AC system should start at about 30 psi refrigerant pressure, while standard cans have 60 psi in them.
So normal procedure is, that with empty system you start filling the system and engine running, once the can build 30psi in the system -the compressor should start and take more charge. If the compressor doesn't start, than you have other problem.
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post #5 of 5 (permalink) Old 08-30-2011, 02:20 PM Thread Starter
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Quote:
Originally Posted by Kajtek1 View Post
Your car should never, ever take freon.
Those years use R134 refrigerant.
Than assuming you have right refrigerant, your problem is somewhere else. The AC system should start at about 30 psi refrigerant pressure, while standard cans have 60 psi in them.
So normal procedure is, that with empty system you start filling the system and engine running, once the can build 30psi in the system -the compressor should start and take more charge. If the compressor doesn't start, than you have other problem.
Hello Kajitek1,

Yes the refrigerant is R134 but being a lazy person as I am I just called it Freon.
I will go back to the ac mechanic and see if he can get at least 30 psi into the system. My understanding was that the R134 is not being accepted since the compressor is off but it makes sense that it is off due to low R134 Refrigerant.

Thanks for your help

Jim
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