[Killer2000]

Hi, my cars (mercedes e320 cdi year 2000 w210) AC has stopped working, it only blows out coldish/warm air.

Basically the the a/c compressor does not turn on anymore (does this mean i have to add r134a rifigarant??) if so where is the port where i have to add it??

Also i was just wondering wherther the air con compressor is linked to the aux fans. Becasue they don't turn on anymore for ac (aux fans do turn on for about 3 seconds when egnition is turned on to start the car.)

Cheers

 

[Killer2000]

i would also like to add that the car also howls when the engine is warm (when i rev the car from idling) can this be linked to the ac problem? or is it just another problem? any1 every heard of this? solution?

Cheers

o p.s Kwik Fit recharged my ac about a year ago and they reported that it had no leaks.

 

[Killer2000]

ok thanks for that. I take it u get all the codes and that from a diagnostic machine? (so i'll have to take it to a garage to get that info)

 

[Killer2000]

unfortuantly i don't have that climate control thing (ac display) . I just have the scroll things (to select hot and cold) and knobs for u know what. But thanks for the help.

How much did the part cost for a new compressor. Is this the part which was replaced?

http://www.automotive-air-condition...ERCEDES&Model=E CLASS (W210)&part=Compressors

 

[Killer2000]

No compressor never comes on anymore (or when u rev).Will take car to get it diagnosed to see if/what part has gone first.

Thanks 4 ur replies.

 

[Killer2000]

so in order to fix this problem i may need to...

-Change the air conditioning compressor
-or charge the air con system up and maybe that will sort out the whole issue
-or do something to the condensor which im still unsure about
-or clean the douvalve

anything else?

 

[Killer2000]

Thanks for all ur responses they have been a great help. As this has constantly been on my mind (what the cause of the problem) i remember that AC has never actually been super super cold. (Actually make u shiver or feel cold) When i topped the AC up about 9 months ago it did help but not really enough.

So basically i am seriously suspecting the AC compressor.

I’m taking the car in just to get all the AC Fluids checked out (it's free). That will tell me if there is a leak or not and will help me in my investigation.

I shall keep u all informed.

 

[Killer2000]

Oh just to tell u that when i put the heating on in the car ofcourse heat comes out of the vents. When i put the temperature on cold, the hot air goes to warm and over time gets cold but not ac cold. (takes a long time to get to cold from hot) Don't know if this has any significants but want to let you lot know just in case some 1 has been experiencing the exact same problems as i have.

 

[Killer2000]

Ok went to Halfords to day as they check the ac refrigerant level for free. It had plenty of juice in the system. Therefore i am going to change the AC compressor. (as it don’t work/ac clutch does not engage/turn) Does anyone know if you can buy the clutch separately?(maybe its just the clutch gone)

 

[Killer2000]

o ok. Erm when i say check the ac levels they actually just checked the pressure from the low pressure port and said it is plenty.

Cheers for your repsonses. Halfords didn't say you need a new compressor i just wanted to make sure there wasn't a leak (as someone said that if there is no r134a in the system it causes the air compressor 2 stop working) As there is plenty of r134a i thought that the AC compressor had gone.

I think the safe bet is to put the car on a diagnostic machine to determine if the sensor is bad and see what is really wrong with it. However the only thing is that the diagnostic machine dont tell you if there is a machanical problem. (this is what happended before with another problem with the car) (wasted money)

Yes have read AC stickys, they are very very long though.

Thanks for the warning.

(wasn't going to get a new AC compressor was gonna get a reconditioned 1 for about £70)

 

[Killer2000]

also some1 said in this forum when he was trying to fix his aux fans he said make sure the ac compressor clutch works. When i turn on my AC the aux fans should turn on right? but they don't. More evidence that the sensor or new air compressor may be needed.

 

[Killer2000]

Ok cheers for that. I wish i had climate control thingy so i could retrieve the codes. Yes please send the link.

Just 1 question how mcuh do Mercedes Benz charge to put the car on the diagnostic machine?

Cheers

 

[Killer2000]

Yeah have already checked all the fuses they all seem fine. but relay and sensors need to be checked.

I know of one MB specialist "mercs only" but they rip people off.

I Will see today if the compressor is getting power or will hook it up to an external powersource and see if it turns if that's possible.

Thanks 4 the links.