Went to turn on my air conditioning in my 2010 e550 and it is as though there is no power going to the ac controls. No red light turned on or anything, completely dead. Is this a fuse issue? Any help would be appreciated.

 

only way to know if it is a fuse is to check the fuse.

 

Check front SAM @ engine compartment, f12 (7.5A).

 

Sorry to thread jack but does anyone know which one is the low pressure line for the ac? I glanced at it quickly and I see two lines right next to eachother. I need to top off my ac I think.

 

See attachment.

 

thanks konig unfortunately I looked under the hood this morning and saw this on the pulley. Any idea if this just means my clutch went bad and I can just change the pulley? I see a replacement for around 80 and the labor doesn’t seem to hard.

 

Pulley can be replaced if this is your problem, should be compatible for compressor part # 0022303811.

 

Compressor may be bad too looking at that burned up clutch.
Like compressor locked and drive belt just kept spinning the clutch until it cooked itself and melted.

 

I think that may have happened. Is there a way to see if the compressor is bad before changing the pulley? I have no ac codes at all.

 

see if you can spin compressor and listen/feel for bad sticky grinding etc.

Should be smooth with compression on output port and suck on large low pressure port.

might be easiest to remove and check.

 

I don’t think I’m going to take the compressor off until I have a replacement ready to put in there. Can I check this by taking the belt off? Also to spin just the compressor would I just take a wrench and turn that nut clockwise?

 

I am pretty sure the nut is connected to compressor shaft so yes spin nut
unsure direction as it has been a while but shouldnot hurt spinning it with a wrench.

If compressor is toast, Proper repair is to completely flush can clean AC system before instaling any new part.

IF old compressor failed it likely pump out into the system junk and debris which will just make existing parts fail/clog and could come back and ruin new compressor.
You would need a new dryer(accumulator)

Proper repair of compressor replacement from one that failed is a big job.

 

Got it working it was just the clutch. I actually didn’t even need to change the pulley or remove the snap ring. Very fast and not too difficult repair that saved me close to $1000. I wonder what causes this because the compressor seems to be working fine. Could the clutch have seized up?

 

Clutch's job is to "Seize up" and connect pulley to compressor shaft so it will spin.

Old age could be reason or some have a certain gap that can wear larger over time and then cause clutch to SLIP which would burn it up.

 

Ahh… I thought it may have seized while the compressor was off.