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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: 2 years ago.
Category: Mercedes
Expert:  Marty replied 2 years 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 2 years ago.
We added 2 cans of freon.
Customer: replied 2 years ago.
The car blows cool air for 0 minutes/then hot air. No air comes from the center vents.
Customer: replied 2 years ago.
Make that " the car blows cool air for 30 minutes/then hot air.
Expert:  Marty replied 2 years 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 2 years 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 2 years ago.
Ok, so is everything working ok now?
Customer: replied 2 years ago.
OK. Thanks.
Expert:  Marty replied 2 years ago.
You're quite welcome. Would you like me to leave the question open or have the moderators close the question?
Customer: replied 2 years ago.
Please do leave it open as ( you know ) how a 25 year old car can act.
Expert:  Marty replied 2 years ago.
Will do. I'll be here if you need anything.
Marty