Wierd AC issue!
Thread Starter
Member
Joined: Sep 2010
Posts: 133
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2016 GLE 4MATIC
Wierd AC issue!
Hi,
My 550 is about 7K old.
Was coming back from a trip yesterday. Had my AC on at about 70, 'zone' turned on so both sides were equal. For some reason, my side started blowing hot air. I mean, heating like its 20 degrees inside. So I checked the vents on passenger side, and they were blowing nice cool air. I turned 'zone' off, and dropped mine to 65, and even lower. No change. I tried all kinds of things - Turned 'auto' on. Turned it off. Tried different 'modes'. Whatever. It would not obey any commands. I was sweating bullets here.
Finally, I pulled over. Turned the car off. Let it sit for a few minutes. Turned it back on. Life was good finally. Its working fine now.
Its not an issue anymore, but just wanted to share and see if anyone had any technical insights. If not, its no big deal. I just hope it does not happen. If it does to any of you, you know what to do.
My 550 is about 7K old.
Was coming back from a trip yesterday. Had my AC on at about 70, 'zone' turned on so both sides were equal. For some reason, my side started blowing hot air. I mean, heating like its 20 degrees inside. So I checked the vents on passenger side, and they were blowing nice cool air. I turned 'zone' off, and dropped mine to 65, and even lower. No change. I tried all kinds of things - Turned 'auto' on. Turned it off. Tried different 'modes'. Whatever. It would not obey any commands. I was sweating bullets here.
Finally, I pulled over. Turned the car off. Let it sit for a few minutes. Turned it back on. Life was good finally. Its working fine now.
Its not an issue anymore, but just wanted to share and see if anyone had any technical insights. If not, its no big deal. I just hope it does not happen. If it does to any of you, you know what to do.
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Joined: Feb 2007
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From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
I had a similar problem with my 2011 E550 when it had less than 750 miles on the clock last year. The only thing that restored the system to proper function was to turn the car off and to wait 5 minutes unitl everything quiesced. I reported this to my dealer, but they could find nothing wrong and there were no codes logged to inidcate the malfunction. It's never happened again in the last 10 months and 12,000 miles. My service advisor speculated that the system has lost communication with the sensor on the driver's side of the car and thought that it was way below freezing so that it needed to turn on the heat!!
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
Depending on build date dealer may need to flash AC software reference bulletin LI83.00-P-050296 https://mbworld.org/forums/4342943-post20.html
Thread Starter
Member
Joined: Sep 2010
Posts: 133
Likes: 0
2016 GLE 4MATIC
Depending on build date dealer may need to flash AC software reference bulletin LI83.00-P-050296 https://mbworld.org/forums/4342943-post20.html
