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Old 09-02-2017, 01:18 PM   #1
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MBS 2400 Cab A/C issue

We recently drove approximately 6 hours in 100 degree heat. The cab A/C worked great at first but then the air became somewhat warm and it seemed that the volume of air coming out of the dash vents was significantly decreased. However, once we stopped for diesel and a coffee, started the van - air was cold and life was good, for about 40-50 miles. Same problem. I experimented: exited the interstate and parked on the on-ramp. Turned the ignition off for exactly one minute. Started the van and voila!, cold a/c...for about 40 miles, same thing. The next experiment was to simply turn off the A/C while driving and leave it off for about 30 seconds. Voila!-cold air. This is a 2015 Sprinter chassis and a 2016 coach. Any ideas anyone?
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Old 09-02-2017, 01:33 PM   #2
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Similar symptoms on my MBS 2400R. I found that after a time, it would switch from recirculate air to fresh air. When it's really hot outside and bringing in that fresh but hot air, it doesn't cool as well. When I switch it to recirculate, it works great. I just watch the recirculate/ fresh control, and it's no big deal. Hope yours is as simple.
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Old 09-02-2017, 03:00 PM   #3
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Same symptoms on our 2012 Solera. Mercedes dealer replaced a "temp sensing resistor", which, I think, in effect "automated" the process of turning the compressor off for a while if the system reached a certain level of cold temperature. I think this is to prevent icing - which, I suspect, is why the air flow is reduced. AC has worked fine since this service.
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Old 09-02-2017, 05:34 PM   #4
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My MB's AC was freezing up as well, no matter the outside temp.
BUT: I was running the AC with the temp setting as cold as the dial would go. I found that if I set the temp dial to no less than 62 degrees, it would not freeze up the coil. No problems since I backed it off the max setting.
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Old 09-03-2017, 04:28 AM   #5
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Quote:
Originally Posted by barnbnb View Post
My MB's AC was freezing up as well, no matter the outside temp.
BUT: I was running the AC with the temp setting as cold as the dial would go. I found that if I set the temp dial to no less than 62 degrees, it would not freeze up the coil. No problems since I backed it off the max setting.
I found the same.
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Old 09-03-2017, 08:32 PM   #6
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Quote:
Originally Posted by barnbnb View Post
My MB's AC was freezing up as well, no matter the outside temp.

BUT: I was running the AC with the temp setting as cold as the dial would go. I found that if I set the temp dial to no less than 62 degrees, it would not freeze up the coil. No problems since I backed it off the max setting.

Same also.

I think it's documented somewhere also the air recirculation only stays on for 30 min or so at a time.
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Old 09-03-2017, 08:33 PM   #7
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I also found the same. Keep it at about 62-65 and it works fine.

Also the recirculate cabin air option only stays on for 30 min or so. It's a know "feature" of the Sprinter.
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Old 09-04-2017, 10:59 AM   #8
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We've been on the road for 4 1/2 months now in 2016 mbs 2400w on 2015 sprinter - same issue. I found if I turn the AC off (leaving the fan on) it will start spitting a little water but then the air volume picks up again. Turn AC on and all is well for another period of time. Other days it's never an issue. I will also try setting the temp higher & see if it makes a difference.
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Old 09-05-2017, 07:38 PM   #9
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never noticed that issue, but we do have a curtain that we close on real hot days to separate the drivers compartment from the cabin. We can leave the air conditioner set around 75 and the fan on medium. this lets us stay quite comfortable as well as save on fuel.

Hope this helps.
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Old 09-16-2017, 12:41 AM   #10
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Quote:
Originally Posted by idahobaker View Post
We recently drove approximately 6 hours in 100 degree heat. The cab A/C worked great at first but then the air became somewhat warm and it seemed that the volume of air coming out of the dash vents was significantly decreased. However, once we stopped for diesel and a coffee, started the van - air was cold and life was good, for about 40-50 miles. Same problem. I experimented: exited the interstate and parked on the on-ramp. Turned the ignition off for exactly one minute. Started the van and voila!, cold a/c...for about 40 miles, same thing. The next experiment was to simply turn off the A/C while driving and leave it off for about 30 seconds. Voila!-cold air. This is a 2015 Sprinter chassis and a 2016 coach. Any ideas anyone?


We had this exact thing in 2015 truck w/2016 WS house. We were on our way to CDA, Idaho in July, I was driving. My husband did all kinds of fooling with it and it would run well for 30 minutes or so. And fail again. We took it to Mercedes Benz dealer and the coolant was very low, fixed for "free".
And the house air conditioner didn't work either so it was a hot trip, appt scheduled with RV dealer in October to fix that.

We met a couple in our RV "resort" with a beautiful brand new 2017 Winnebago View. Their MB had no cool air either, they had to stop in Boise and beg the dealer to look at it right away. Instead of the next week appt they tried to give them. Their coolant was also very low.

And their hot water heater didn't work. So FR is not the only business failing its' customers.
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