Altin

I replaced my climate control becouse my older one had a broken screen
but two weeks later on the one i bought the EC light stays on therefore the ac comresor won't start . is this brocken or it could be reset!?

waybomb

If it senses certain faults, the control will not allow the compressor to run, until repaired. This condition also causes the ec light to remain lit.

Maybe you have a problem?

RichardM98

Run the built-in CC diagnostics and examine the values. Normally the EC light signals a low refrigerant charge or a faulty pressure sensor.

http://www.eclassbenz.com/2010/02/ho...-malfunctions/

Altin

thank you guys, any idea on how reset the speedometer and rpm arrows to start counting from zero ? right now they are droped below zero and they start from there , they droped while i was changing a couple of instrumen bulbs , and i put them back in place by hand but soon as i turned the ignition on it dropes back down below zero any idea how to fix it or why they droped ???

dtederick

In another forum I found an old service bulletin that showed how to reset some of the systems, so I am posting this for all future people to see. Again this is a 1998 C280 with single climate control. The EC light stayed on all the time. I replace the evap temp sensor and reg temp sensor, thanks to sleepwalker's help. Then I recharged the system with freon and 46 PAG oil. By the way you must get the compressor to come on to charge the AC if your's won't come on, then hold down EC and Rest until the EC light goes off, the compressor will kick on. After you have recharged everything turn the ignition off. Turn the key back to the second position and turn up the temp to HI and then turn the key off again. Now hold down Rest, and keep holding it while you turn the key to position 2. OOP should flash on the Climate screen. You're done. Now turn the key off and crank. Problem solved, as far as I know anyway. I made sure I posted this because my local Mercedes shop tried to tell me that I couldn't reset it without a several thousand dollar machine, and I didn't have the knowledge to fix everything. Well, I didn't have the knowledge, but I spoke to enough people on the internet to piece everything together. I appreciate everyone's help, and hope this returns the favor. The local Mercedes people wanted $550-$750 to fix the problem. So I greatly hope this helps future Mercedes owners. I know the stress that no AC can cause. By the way the system holds 1.9 pounds of freon.

Altin

thank you dtederick. good job ,thanks alot.

sedd1938

HI I'M NEW TO THIS DON'T KNOW HOW TO GET STARTED- I TOO HAVE A PROBLEM-HOPE SOMEONE CAN HELP ME--I CHANGED MY COMPRESSOR- CHANGED CLIMATE CONTROLL -CHANGED CD CHANGER IN MY 1999 E320- MY EC LIGHT IS STAYING ON --I READ MY CODES ON CLIMATE CONTROLL AS I FOUND THE 1ST 8 CODES PERTAIN TO THE AIR CONDITIONER -SO HERE ARE MY CODES 93-87-96-94-91-143-20-150 AND MY ERROR CODE IS B1241- SO IF ANYONE CAN HELP ME PLEASE

Plutoe

The fault indicates that you are low on refrigerant, and low enough to damage the compressor,ie the EC lamp.

However when you look at the actual value data #7=20 and #8=150---something is not kosher, because that is where you should be with full refrigerant.

To add to the conundrum #5=91---that is way high as should be in the low 40's

You have no other faults therefore I and others would assume that all the sensors are reporting correct data!!

When you replaced the AC control did you have it coded to your car---that's a big no no!!

Have you pressed the EC lamp to try and turn it off----if so---I would take it back to whoever did the work and have them do the work correctly!! Have them put gages on to confirm the H and L pressure data you reported!

PS: when someone ## it starts to get expensive because the work has to be done twice!!

lumanikus

Anyone know what the reset process would be for a W208 clk 430 please? Help?