C32 AMG, C55 AMG (W203) 2001 - 2007

A/C problem

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Old Aug 6, 2009 | 02:30 PM
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A/C problem

When the car is in traffic the A/C will turn to warm and only in traffic, on highway it's very cold, if you rev above 2000 rpm in traffic the A/C will turn cold, and not all time this problem appears.
Any help? no codes on Star.
I refiled it with new gaz but the problem is still.
Thanks.
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Old Aug 6, 2009 | 02:38 PM
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sounds like maybe a fan is not kicking in to push the air into the cabin at low speeds....
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Old Aug 6, 2009 | 02:57 PM
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Originally Posted by rockjock
sounds like maybe a fan is not kicking in to push the air into the cabin at low speeds....
maybe i'll check it but i think it will throw a cel if it's the fan.
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Old Aug 6, 2009 | 03:09 PM
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my car seems to blow warmer air too when im idling just figured it was normal operation
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Old Aug 6, 2009 | 03:17 PM
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dont mean to thread hijack, but does anyone know the optimum refrigerant pressure and perhaps what pressure is considered to be low? i've been messing with that nifty A/C menu and i believe option/readout 9 displays refrigerant pressure
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Old Aug 6, 2009 | 03:18 PM
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I think there is a small fan in the dash housing (blower motor, ect as well as the guts of the air divertion system) that I think may not be working for you-turn on the air (no AC) and set it at 4-5 from the front vents-it should push pretty hard-if it is-nix the fan idea-could be the compressor not getting enough from the belt below 2k rpm (which would be a fluk if nothing else)-
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Old Aug 6, 2009 | 03:19 PM
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Originally Posted by jturkel
dont mean to thread hijack, but does anyone know the optimum refrigerant pressure and perhaps what pressure is considered to be low? i've been messing with that nifty A/C menu and i believe option/readout 9 displays refrigerant pressure
I don't know the optimal pressure for the refrigerant, but if it's too low tha a/c turns off all together. At least that's what I thought I read in an another thread.
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Old Aug 6, 2009 | 05:28 PM
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03 R230 SL55 / 94 W124 E500
Originally Posted by Robert AMG
When the car is in traffic the A/C will turn to warm and only in traffic, on highway it's very cold, if you rev above 2000 rpm in traffic the A/C will turn cold, and not all time this problem appears.
Any help? no codes on Star.
I refiled it with new gaz but the problem is still.
Thanks.
I had the same problem; unfortunately I ended up changing the compressor.
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Old Aug 6, 2009 | 10:15 PM
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i have this problem too
im refilling on refrigerant this weekend to see if it persists
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Old Aug 6, 2009 | 10:17 PM
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Originally Posted by moosejaw
i have this problem too
im refilling on refrigerant this weekend to see if it persists
do you know what your refrigerant pressure is? i think option/readout 9 on the nifty AC menu is for refrigerant pressure
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Old Sep 17, 2009 | 08:26 AM
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clk 500
Hello...did anyone ever find out what the problem was with the ac? im having the same problems.

Thanks
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Old Sep 17, 2009 | 01:18 PM
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Originally Posted by jturkel
do you know what your refrigerant pressure is? i think option/readout 9 on the nifty AC menu is for refrigerant pressure

The problem is when you have a hot girl sucking on your "three pointed star" and your car is idling, the AC will not work since the only motor idle increasing is yours!!!

Take it to an AC shop, they can pressure test the system and either add or reduce refrigerant as needed. On a 6-7 year old car, it may very well need a can. AC is just one of those things I never touch myself.
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Old Sep 17, 2009 | 04:52 PM
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I also had to replace my A/C compressor. Along with just about every other accessory on this car.
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