Hi,

I've got a 2002 c230.

My AC won't blow cold. The heater works fine, although, it seems to take a while for it to get hot.

I recently replaced the climate control unit, because the knobw as cracked.

I went to Greffs motors, which has a master Mercedes mechanic, and he said:

The compressor is bad.

And that it also isn't getting power from the front left SAM.

Now, I need to know everything about this so I can try to DIY it, but, I'll start with just a couple basic questions.

If the SAM isn't sending the AC power, how do we know its bad?

If, when manually touching the AC with our own power, and the fan turns on ( I had another mechanic do this), how could they know that the condenser is bad?

So, what further diagnostics do I first need to do.

I'd like to determine whether it is condenser related, SAM related , or sensor related.

Thanks

 

Nice I have the same thing and car. Only winter now and no need til march or so

 

There can be a lot of different problems. Could be a SAM, wiring, compressor, leak, sensors... ect. Kinda a hard problem to diag over the interent. If it is a bad SAM, it isnt for a DIYer to due. Version coding needs to be done and that requires factory equipment.

 

same problem with mine, it just needed regasing

 

What is regazing

 

thats re-GAS ing , it when your air con system has run low on the gas inside, so it has to be topped up with the gas that it uses, there should be a little bubble in the sight glass near the compressor, if not , then it needs re gassing
hope this helps

 

Valued info perkyturbo, I appreciate it. Got any ideas why when I start the car it shuts off if I turn the steering wheel. Or put it in gear without pushin the gas?

 

is the engine tick over speed too slow ? it should tick over at about 700 to 800 rpm, if its slower than this it could stall as soon as any load is put on the engine

 

How do I adjust the tick over? I'm new at mercedes mechanics.