dlwiser

My fan had to be replaced about a week ago, and now I tried turning my AC on and its just blows hot air. My question is: does the fan have anything to do with the AC system? Like being hooked up wrong or something not hooked back up.

*Took my car back to the dealer and they did a check, $200 later and of course they said that it wasn't anything they did and there was possibly a clog in my system.

I also tried to search and see if I could find schematics of the AC system so see where a clog could occur.

Thanks!

rlddlr53

did you recharge?

dlwiser

Yes, they 'said' they tried to but they couldnt bc of a 'clog' in the system.

blackbenzz

I don't know if this will work for your car but turn the ac on full blast, then hold the "rest" button until the display changes. Push the left "auto button" repeatedly until the left number reads 7. Then tell me what the number to the right says

dlwiser

ok, i did that and the right number said 93 for about 2 flashes then went to 95?

blackbenzz

Did you tab over to number 7? The number shouldn't be that high unless your car is different than mine. I was experiencing hot air from my ac and when I went to #7 it read 0, this is your freon pressure. Went to the local auto store and bought a can of freon with a gauge so I wouldn't overfill it. Ac started blowing cold with the freon recharged

dlwiser

tab over? can you elaborate? I pushed the rest button untill i had numbers flashing... double 0 on the left and 93 on the right.

blackbenzz

Ok seems like yours is a little different than mine. Push the left "auto" button, you have dual climate control right? do that until the left number reads "7" or for you it might be "07" and read the number on the right

dlwiser

okay, i just hit the right button 6 and 7 times and both of those have 0 for the right number

dlwiser

errr, lemme make sure that the left number says 7... they are really high numbers i think i remember like in the 50's n such

dlwiser

ok, got it.... 07 on the left and -0 on the right

diablo30se

What's up with the C63 AC? Mine is'nt 6 months old and has had to be recharged twice?

dlwiser

hmm... im going to try the parts store recharge thing

blackbenzz

Recharge your freon, should be good to go!
You probably have a leak. Take it to MB and have em fix it under warranty

dlwiser

thanks for you help, ill let you know the results

blackbenzz

No problem. Hope it works! Get one of those kits with a gauge. Once you connect it you will see how much freon is in there

dlwiser

will do

dlwiser

just right off hand, does anyone know what the plug for the radiator fan actually provides power to? I know the fan but there seem to be too many wires for just a fan.

dlwiser

Got the kit, and when i plugged it in the needle pinned itself in the RED. So i unplugged and tried again, this time it didnt move anywhere. unplugged and tried again and the same, no where. Did it once more making absolutely sure i had it on there and got the same 0 reading. So i went ahead and filled until I got it in the green. it literally took maybe 5 seconds after i opened the bottle. Hardly any of the bottle was used. went and felt the AC and its still hot as hell.

Any other ideas?

Could the temperature sensor cause this?

Also, I do not have the stock fan in there. Could that be a cause?

Thanks!

loudandheard

So mercedes told you that you had a clog in your system, but they tell you what needed to be fixed or what was actually clogged.

In my older car I would take it to a shop and ask them to check it out and once the problem was determined I would fix it myself.

dlwiser

They said they tried to pressurize the system and they said it wouldnt take anything. They said they tried the low and high side. So they said it was probably a clog in the system. No info as to where or what. I'm pretty car savvy but I dont know much about ac systems and what they include. I'm pretty sure its not the compressor bc its blowing air just fine. The air is just hot.

I did the whole self recharge thing today with no results.

Also, if the temp sensor is damaged or unplugged could that cause the ac not to work properly?

loudandheard

I know a few people have access to some sort of info guide for our cars. I think it's called WIS or some thing like that and it will trouble shoot things for you. I had purchased some thing similar, need to see if I have it. Maybe I can find some useful info.

I just find it so weird that the system could develop a clog, maybe some sort of tubing was bent. Were there a CEL?

dlwiser

nope no CEL. I just tried to turn the AC on one day and it never got cold. So i took it in. Several weeks later, here i am. hahah