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Brad, Dealership Technician
Category: Chrysler
Satisfied Customers: 7828
Experience:  19 Yrs Chrysler/Dodge Technician..ASE Master Certified(L-1)
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A/c concern makes to much head pressure and locks up

Customer Question

a/c concern
makes to much head pressure and locks up compressor clutch
and breaks belt
if we lower refrigerant to get head pressure down will not cool system
have replaced compressor 4 times
have replaced expansion valve 4 times
have replaced condenser and cooler lines
what are missing
Submitted: 9 months ago.
Category: Chrysler
Expert:  Brad replied 9 months ago.

Good morning and welcome to JustAnswer!!

My name is ***** ***** I have worked for a Chrysler-Dodge-Jeep dealership for 19 years and I will do my best to help.

Is the condenser fan coming on when you turn the a/c on? When the compressor failed did you flush the entire system along with replacing the components? What are your pressures when the a/c is on?

Talk soon,


Customer: replied 9 months ago.
the fans are working
yes flushed the system when replaced
high pressure would just peg out
Customer: replied 9 months ago.
technician is working on another vehicle at this time can not get exact pressures
have new a/c complete kit to install do not want to damage kit if I am missing what the original component that is causing the high pressure to be to high
Customer: replied 9 months ago.
vin 3C8FY4BB91T544721
Expert:  Brad replied 9 months ago.

Did you charge it to 1.56 lbs? Did you flush the evaporator? I believe your PT cruiser has a orface tube in the liquid line, was the liquid line replaced between the outlet of the condenser and the inlet of the evaporator?

Customer: replied 9 months ago.
we charged back with r-134a at 1.56lbs
yes we flushed the evaporator
yes we replaced the liquid line
Expert:  Brad replied 9 months ago.

Does the high side gradually come up or does it shoot up fast when the compressor is engaged?

Customer: replied 9 months ago.
I will check with the technician and see when he can re-check for me then I will get back with you with more informationThank you
Expert:  Brad replied 9 months ago.

You are very welcome.. I would also like to know the pressures when you start it up and how they increase when the compressor is on. I would suspect a high side restriction or not enough air flow thru the condenser..

Keep me posted,


Expert:  Brad replied 8 months ago.

If you need anymore assistance feel free to shoot me a reply and don't forget to RATE before leaving the site so I get credit for helping you today..

Have a great day,


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