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2011 E350 Coupe with sport option, 116k miles.
AC blows warm. No flashing red light on the control panel, no code when scanned with Autel MaxiCheck 808. I can't even connect to the module for it, scanner says unable to establish communication. freon was full (showed overfilled around 80psi), I drained the freon and replaced the pressure switch (transducer). I went to refill it with new R134 and before it got halfway through the first can, it started showing excessively high pressure on the freon pressure gauge again. I emptied a can and a half into the system and still no cold air. No leaks, still shows over-pressurized. I'm stumped. Any ideas? Some insight would be greatly appreciated. Thanks everyone!
Aside from leaks, you could have condenser issues, bad compressor, or an electrical fault. What doesn't make any sense is that you don't have any fault messages. How long have you owned this car? Did it work last year?
Aside from leaks, you could have condenser issues, bad compressor, or an electrical fault. What doesn't make any sense is that you don't have any fault messages. How long have you owned this car? Did it work last year?
What surprised me is how it won't connect to the scanner to check the module for codes. but if it stored a code, wouldn't the red light on the control panel blink?
I bought it from an auction. Had it about a month. Didn't work when I got it. I want to resell it but this will affect it's resale value. I'd like to maximize my profit on it, lol
LOL, that probably is the reason why you were able to buy it at auction...unless you have an HVAC guy for cheap, I'd just flip it and move on...
you may not realize the accuracy of your comment, lol. It's from a dealer only auction and was auction by AuctionDirect USA, which is a high-volume dealer. They will generally auction anything that isn't fixable within minutes.
I did list it as is for 11k. Another reason why it went to auction is because the sunroof doesn't work. I can see bits moving in the tracks under the glass so it's probably not the usual broken drive gear under the dome light. Knowing MB, everything down to the neighbors car will have to be dismantled to get to the problem.
Did you check the compressor pulley? My clutch burnt out recently and the ac kept blowing hot air with no codes. I just happened to look at it and saw melted plastic all around it. Swapped it with one I got at a junkyard and it's been blowing cool ever since.
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