W211Virgin

So I think my heater control valve has gone out as I no longer get heat from my heater.

My question is...is it possible that it can be something else?

Also, how hard was the labor? Youtube makes it look easy.



Edit: Lastly, which one do I get?

Part #: 211-832-05-84-M22
Part #: 211-832-06-84-MBZ

kajtek1

Troubleshoot before dropping new parts.
http://www.mercedesmedic.com/ac-air-...le-codes-list/ shows you how to do it with climatronics having REST button.
If you don't have such, you need to use scanner.

W211Virgin

Thanks for the reply but I do not have these buttons they speak of...

I have the REST button, but my dash looks different than illustrated.

Should I just unplug the battery and see if it resets the system?

nivram13

For RHD it's one of the worst jobs I've done due to the very restrict space. Some have replaced valve and still had no heat as a result of a failed front SAM highly unlikely but a very remote possibility.

W211Virgin

Yeah the car is a RHD and the worst part is that I have HUGE hands!

Thinking about out sourcing the job but my ego/pride is getting in the way.

I have board exams June 2nd so this will have to be done after then...

No heat T-minus 18 days

nivram13

Same the trick is to pull the valve up on top with all the hoses connected, as you pull it out from under the master brake cylinder take photo and note the orientation of the valve and hoses believe me it will only go back in one way!

Pulling the valve out is easy enough take your time it is doable I've done two of these now, allow yourself 3 hours you'll need it. If you can get a garage to do it in under 2 hours that's good everyone one I spoke to said 4 hours minimum with the stealer quoting upto 7 hours!!!

Strigoi

That pic in the link is from a W210.

jimbo1763

It probably is the valve, but I have had success getting mine to shift over (from hot to cold in my case) by pushing the button for the defrost function, letting it shift over to that, and then going back to auto, etc. That may be (and likely is) just unsticking some flap, etc in the system, but it has worked for me on more than one occasion. Worth a try. Down where I live, going without air conditioning is brutal.

kajtek1

Resetting will not fix bad sensor.
Read the help site with replies under.
If you have REST and LCD panel displaying the numbers, you don't need to crystal-ball guessing.
As I said- other option is a scanner.
You will know what precisely is wrong in few minutes.

W211Virgin

OBD II scanner?

kajtek1

W211 the only port is OBD, so this is where you have to plug each scanner, but cheap OBD II scanners will not support Mercedes-specific modules.
The cheapest scanner I found that can enter MB data is MaxiEcu,

W211Virgin

Good news and bad news...

Heater works

I tried the defroster setting and noticed warm air...then I changed the different vents and now I have hot air everywhere...

But now I am confused....do I have a short? Did I press the REST button when I shouldn't have?


What did I do?

jimbo1763

I have had that problem only a few times over the (so far) ten year life of my car. After I have used that trick and gotten the system to shift from (in my case) hot to cold, it has behaved just fine, and usually does for quite a long time, so I have not diagnosed it further or thrown money at it. I have not noticed the issue arising more frequently as the car has aged.

Sorry that I can't give you a better answer.

kajtek1

I had issues on W210 when for no reason 1 side would blow hot, the other cold. That always reset with ignition cycling.
I took it for computer schizophrenia.

jimbo1763

Mine would not reset on a restart. I started pushing buttons trying to get it to shift over and succeeded using the defrost function. Go figure.

W211Virgin

How I felt when I wasn't getting the hot air I wanted!