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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3567
Experience:  Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
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1) 91 350 sd blows cool minutes/then hot.2)does not

Customer Question

1) 91 350 sd blows cool for 30 minutes/then hot.
2)does not blow from center vents. EJB.
Submitted: 1 year ago.
Category: Mercedes
Expert:  Marty replied 1 year ago.
Hi, welcome to Just Answer. My name is Marty? Can you give me some background on these problems. Has any work been done? Has anything been checked or replaced?
Customer: replied 1 year ago.
We added 2 cans of freon.
Customer: replied 1 year ago.
The car blows cool air for 0 minutes/then hot air. No air comes from the center vents.
Customer: replied 1 year ago.
Make that " the car blows cool air for 30 minutes/then hot air.
Expert:  Marty replied 1 year ago.
Does the compressor turn off after 30 minutes? Do you have a pressure gauge connected to the high and low side ports?
Customer: replied 1 year ago.
Compressor does not turn off. We hook the gauges and ran car with ac on for over 45 mins before I picked you up went for a road test around the loop and have no issues.
Expert:  Marty replied 1 year ago.
Ok, so is everything working ok now?
Customer: replied 1 year ago.
OK. Thanks.
Expert:  Marty replied 1 year ago.
You're quite welcome. Would you like me to leave the question open or have the moderators close the question?
Customer: replied 1 year ago.
Please do leave it open as ( you know ) how a 25 year old car can act.
Expert:  Marty replied 1 year ago.
Will do. I'll be here if you need anything.

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