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2012 Mercedes GLK 350 - A/C Cooling problem

Posted: Fri Sep 18, 2020 10:04 am
by forumoto
my ac blows hot on freeway, Cool in town what could it be.?.and Cool in park..?

Compressor has been changed yet still...

Thanks

Re: 2012 Mercedes GLK 350 - A/C Cooling problem

Posted: Fri Sep 18, 2020 2:09 pm
by Dougflas
Start looking at the metering device. If possible, tape a gauge set onto the windshield and give us the readings.

Re: 2012 Mercedes GLK 350 - A/C Cooling problem

Posted: Fri Sep 18, 2020 2:54 pm
by forumoto
Metering device? You mean the manifold gauge or what?

Re: 2012 Mercedes GLK 350 - A/C Cooling problem

Posted: Sat Sep 19, 2020 2:31 am
by Dougflas
forumoto wrote:Metering device? You mean the manifold gauge or what?
Negative. I am speaking of the TXV or orfice tube. There are the devices that allow refrigerant to flow into the evaporator.

Re: 2012 Mercedes GLK 350 - A/C Cooling problem

Posted: Sat Sep 19, 2020 6:12 am
by forumoto
Expensive tool like which type? Are you thinking about scan tool? I have autel scan tool. Which can analyze the lice data pid of the A/C module and Engine Module, all that matter is the sensors to select for this info to display and record.