C320-Cav

I have been experiencing a weird problem with the A/C. It sometimes works and sometimes doesn't. What could the problem be? Could it be the clutch? Also, sometimes when it turns on, as soon as i touch another button the A/C shuts off. Its freezing here in Seattle and would like to get this fixed externally if possible before i start tearing apart the dash to see if it is an electrical problem.

P.s. the fan by the battery under the windshield does not spin.
My climate control works perfectly fine just that the stupid A/C fan does not work.

Any and all input is appreciated!

phister

Well of course it's cold you're using A/C lol it sounds like your fan motor might be going out. Check your compressor too, kind of a pain to get to for that one but that doesn't sound like the issue.

C320-Cav

hehe well when I said A/C I meant as in heating as well haha

I forgot to mention, the car has a pretty small battery... I dont know what the hell my friend was thinkin when he put this small of a battery in but would that make an effect on the A/C?
I was just outside and tried some combinations lol and what got the heating to work for like 5 mins was turning on the windshield wipers and starting the car.

Hmm, i doubt it would be the compressor but fan motor going out could highly be. Ill have to actually check tomorrow if it doesn't snow to see if there might something be stuck in the motor.

phister

Make sure the battery has enough CCA. Ours requires quite a lot. I'd toss in a MB battery for good measure

C320-Cav

I sure will
I got a quote for $120 installed at MB.

But quick question
Do you know how view voltage on my car? It has a m112 engine and I got into the dyno but it doesnt display my battery voltage

Moviela

I have a 2005 M112. When you first enter the "dyno" the number after UB= the buss voltage, usually 12.6.

C320-Cav

Hmm when I am in dyno mode it only gives me two options. One which allows me to turn dyno mode on and the other one just tells me the instrument cluster information, engine information, and software version.

Is it possible our instrument clusters could be different?

Carsy

Read this re batteries in the 203 https://mbworld.org/forums/c-class-w...ease-help.html

If the fan is not running check for snow blockage etc.Try to physically turn it.

C320-Cav

I'm kind of convinced that it is the battery now. I have been desperatly searching the forums and seening common problems that are caused by weak and old batteries. (The battery I have is dated september 2011 so it isnt old, just weak) I'm not getting enough voltage and I can just see the signs the car is giving me.
1) When using windows or radio on full blast all the lights dim.
2) my compressor for the suspension stopped working which im guessing is not receiving enough electricity to run properly since all wires are fine.
3) the damn heating
4) When unlocking and locking the car the blinkers are out of sync by a little

As for physically turning the fan, desperate needs calls for desperate measures. I stuck my hand in there and gave it my all to give it a physical start... Nothing.

I will be disconnecting the battery and getting a new, bigger, more powerful battery and reporting back on how it goes!
Thanks for the support guys, lets hope this fixes my problem

edgarinho10

Check the battery connection and or terminals to make sure everything is perfectly set and there is no rust either

serif93

i had a simmilar problem with my c200k the fan was not working i changed the fan blower resistor and it didnt work work i changed the control unit because mine is the digital one with display and that seem to fix the problem and now works perfectly as the unit was not responding to anything you press it to do it used to start and stop and would keep doing that for ages eventualy had to disconnect it till i had it fixed

C320-Cav

Sorry I haven't posted in a while, found out my brother and his wife are expecting a baby so I went on a shortcation (short vacation) hehe. But anyways, I have managed to do something about the A/C. Here is what went down.
1) Disconnected the battery for 2 hours and sanded the terminals a little bit to make sure it was rust free (as suggested) and that did not fix the problem
2) Bought new battery and installed it - that as well did not fix the problem
3) Took apart the console to find out the A/C control unit was not properly connected... I know, right. Well, my main issue is fixed but now I have a small leak in my fuel filter (check engine code p0442) $50 for the part at my local european import shop.

Thank you all for the support and suggestions. I'm glad my heating works again

serif93

silly little mistakes always the problem and congats on your brother having a baby.
btw saw earlier you were bosnian where about from coz im bosnian as well. and one of my cousins live in seattle.

C320-Cav

Seriously, happened with my cigarette lighter as well. Wasn't working so I replaced the fuse and it didn't fix the problem. Take it out and notice it wasn't even plugged in

Thanks man! Im happy for them

Im from Sarajevo, what about you?
Oh really! who is your cousin??

serif93

I was born in Travnik which is about 2 hours drive from sarajevo and i currently live in perth western australia, my cousin name is edvin draganovic