W124 220 E Air Con not working - Mercedes-Benz Forum
 
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post #1 of 5 (permalink) Old 05-25-2019, 03:53 AM Thread Starter
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Smile W124 220 E Air Con not working

Hello everyone. I hope you'll are having a good day Need help on fixing my W124 AC. I started the car after almost a month and everything ran perfectly fine. However, when I powered on the AC, it didnt blow cool air at all. I later opened the hood and see the clutch engaged and fan running fine. When the AC is off, the fan stops and the Clutch disengages. What do you guys think is the problem here? Appreciate your help on this
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post #2 of 5 (permalink) Old 05-25-2019, 06:28 AM
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If your refrigerant lines near the firewall are getting ice cold, the problem is likely with the blend door actuators in the dash.
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post #3 of 5 (permalink) Old 05-26-2019, 03:36 AM
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If you have your own A/C manifold gages, it's time to use them. If not, take the car to a qualified shop and have them check the refrigerant.



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post #4 of 5 (permalink) Old 05-26-2019, 05:16 AM
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Agree with Jayare, the most common problem will be low refrigeration.

If you don't have gauges available to you, if your system has 134, just pick up a can and install it yourself, read the directions, not hard to do.

And if it works for a day or so and then stops again, you have a leak you need to find..

Did this on my wifes E420, after I figured out it was leaking, tried it the second time with dye. Unfortunately the green dye came out of the HVAC box, the dreaded evap leak.

I bit the bullet and had the dash taken out to get to the evap, expensive, but done for the life of the car. I remember Jayare posting years back about a sealer that worked for him on his 400..


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post #5 of 5 (permalink) Old 05-26-2019, 05:25 AM
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Quote:
Originally Posted by Aero I View Post
Agree with Jayare, the most common problem will be low refrigeration.

If you don't have gauges available to you, if your system has 134, just pick up a can and install it yourself, read the directions, not hard to do.

And if it works for a day or so and then stops again, you have a leak you need to find..

Did this on my wifes E420, after I figured out it was leaking, tried it the second time with dye. Unfortunately the green dye came out of the HVAC box, the dreaded evap leak.

I bit the bullet and had the dash taken out to get to the evap, expensive, but done for the life of the care. I remember Jayare posting years back about a sealer that worked for him on his 400..
Correct..It was ClipLight Super seal Pro that stopped the evap leak for over 5 yrs.

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