cool air A/C new compressor problem
Thread Starter
Newbie
Joined: Jun 2013
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W203 C200 CDI 2007
cool air A/C new compressor problem
hello.
after changing new compressor (denso) at workshop i having problem .
1- A/C is freezing and working great for 10 min and when stop cool at all, after turn it on/off 5-10 time while driving its start cool again.
2- while cooling i have a very bad (gas, Freon) smell that i didn't have before.
i found the mechanic don't know much on my car (destroyed the first compressor) so i prefer yours help please.
B.R
Avi.
after changing new compressor (denso) at workshop i having problem .
1- A/C is freezing and working great for 10 min and when stop cool at all, after turn it on/off 5-10 time while driving its start cool again.
2- while cooling i have a very bad (gas, Freon) smell that i didn't have before.
i found the mechanic don't know much on my car (destroyed the first compressor) so i prefer yours help please.
B.R
Avi.
Thread Starter
Newbie
Joined: Jun 2013
Posts: 14
Likes: 0
W203 C200 CDI 2007
update:
OK today at morning again A/C work great to 10min no smell at all and again stop.
but after few minute my car went to "limp" mode and my turbo is stop working.
i reset by OBD 2 (code P0299) Turbo wake up again but still no AC.
some connection between problem?
thank you .
OK today at morning again A/C work great to 10min no smell at all and again stop.
but after few minute my car went to "limp" mode and my turbo is stop working.
i reset by OBD 2 (code P0299) Turbo wake up again but still no AC.
some connection between problem?
thank you .
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c320
An AC unit that gets super cold and freezes up is low on refrigerant... It sounds like that maybe your problem.. You smelled the leak, now your low , so now you can only run it for a short period of time before it freezes up.. You need to get some gauges on it if you plan on fixing it yourself...
Last edited by stevestar99; May 22, 2018 at 08:30 PM.
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Joined: May 2017
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C320
That's exactly what DAS should be showing you if your AC is switched on. That means the problem is in the compressor, not the control system.
When the compressor was replaced, did they also flush the AC lines and replace the condenser? When this type of compression fails it's prone to something called "black death". Basically the compressor dumps a bunch of metal shavings into to the AC system as it fails internally and turns the oil black. When you replace the compressor it's very important to clean out all the AC line and make sure none of that metallic garbage is left inside the system. If it is the old metal particles will murder your new compressor. A symptom of a dying compression is intermittent AC. Check your bill or ask the AC shop if they flushed the lines and replaced the condenser (condenser can't be flushed, only replaced). The installation manual for the new Denso compressor will tell you the same thing.
When the compressor was replaced, did they also flush the AC lines and replace the condenser? When this type of compression fails it's prone to something called "black death". Basically the compressor dumps a bunch of metal shavings into to the AC system as it fails internally and turns the oil black. When you replace the compressor it's very important to clean out all the AC line and make sure none of that metallic garbage is left inside the system. If it is the old metal particles will murder your new compressor. A symptom of a dying compression is intermittent AC. Check your bill or ask the AC shop if they flushed the lines and replaced the condenser (condenser can't be flushed, only replaced). The installation manual for the new Denso compressor will tell you the same thing.
Last edited by tjts1; May 27, 2018 at 10:49 AM.
Thread Starter
Newbie
Joined: Jun 2013
Posts: 14
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W203 C200 CDI 2007
Thanks for all. the mechanic did not replace condenser and because its my second compressor (and nothing more replace) i cant get the warranty from compressor dealer .i usually work on my car and i will try to do this also. i will go to workshop to clear all gas and replace the condeser. also want replace the expansion valve (can someone point me were is locate? i did not see him on firewall.and you belive i need new compressor can i do something to save it??????
B.R
Avi.
B.R
Avi.
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From: New England! :-)
2005 C230K Sport Coupe
Oh, come on. Didn't anyone else notice the "40C and 100% humidity" readings??
Btw, that's not right. The Humidity reading is likely wrong. And, humidity readings in general are "questionable" in accuracy - even with the best instruments.
For those of us used to Imperial units 40C is 104F. :-O
Iirc, the highest dewpoint recorded (with official instruments) was ~~95F.
Btw, that's not right. The Humidity reading is likely wrong. And, humidity readings in general are "questionable" in accuracy - even with the best instruments.
For those of us used to Imperial units 40C is 104F. :-O
Iirc, the highest dewpoint recorded (with official instruments) was ~~95F.
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W204
A/C stopped cooling, radiator fan spins at maximum speed on start up
My 2012 C300 Sport has just gone 100K miles without any major issues; wonderful car to own and drive. Recently, the a/c has stopped cooling and at the same time, the radiator fan has been running at max speed on start up, regardless of engine temp or even when the a/c is off. Checked the coolant level, all good. Checked the refrigerant pressure using the A/C Pro gauge and the pressure was very high, (way past the green zone). I do not have sophisticated diagnostic tools but know how to turn wrenches and have replaced a common suspect part --- the coolant temp sensor. Access to this part was quite challenging, to say the least. You will cut up your hand badly. Wearing gloves makes access even more difficult. To make a long story short, this didn't solve the problem. Any suggestions before I go to the next step and have the a/c system evacuated and recharged?
Last edited by MaroBenz; Jul 20, 2020 at 09:22 PM.
Joined: Jul 2020
Posts: 1
Likes: 0
2012 C300
A/C stopped cooling, radiator fan spins at maximum speed on start up
My 2012 C300 Sport has just gone 100K miles without any major issues; wonderful car to own and drive. Recently, the a/c has stopped cooling and at the same time, the radiator fan has been running at max speed on start up, regardless of engine temp or even when the a/c is off. Checked the coolant level, all good. Checked the refrigerant pressure using the A/C Pro gauge and the pressure was very high, (way past the green zone). I do not have sophisticated diagnostic tools but know how to turn wrenches and have replaced a common suspect part --- the coolant temp sensor. Access to this part was quite challenging, to say the least. You will cut up your hand badly. Wearing gloves makes access even more difficult. To make a long story short, this didn't solve the problem. Any suggestions before I go to the next step and have the a/c system evacuated and recharged?
MaroBenz i am having the same issue. Purchased a 2012 C 300 used with 65K. I have experienced similar issues with my car. I have discovered that when the air "stops" working I can spray the radiator with a water hose and the fan goes back to normal operation and the A/C will work again. Seems like a sensor issue but I don't know. The problem only happens when i let the car sit in the heat all day (not running on 90+ days) and then try to start it. I'm assuming the pressure is building somewhere and cooling things with the hose will allow normal operation. Once it's running, it continues normal operation unless i shut down the engine and let the car build heat. After an hour of sitting I will have the same problem.
