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Ron
Ron, ASE Certified Technician
Category: Dodge
Satisfied Customers: 34452
Experience:  ASE Certs
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WHY DO I HAVE 450 PSI ON GH SIDE AND 30PSI LOW SIDE

Customer Question

WHY DO I HAVE 450 PSI ON HIGH SIDE AND 30PSI LOW SIDE
Submitted: 1 year ago.
Category: Dodge
Expert:  Ron replied 1 year ago.

Hello and thank you for your question,

If you take a hose and spray the condenser down with water does the high side pressure come down?

Customer: replied 1 year ago.

Its a new condenser but he does have a screen in front of the condensor

Expert:  Ron replied 1 year ago.

Can you run some water over it with the AC running and see if your high side pressure comes down?

Customer: replied 1 year ago.

it came down to normal pressure with the water running on it

Expert:  Ron replied 1 year ago.

In most cases that means you are not getting good air flow across the condenser either due to the cooling fan not drawing or the radiator is plugged with debris, I would start with removing the screen as they usually cause more problem then they solve and I would make sure the cooling fan is drawing a good air flow as well as making sure the radiator is clear of any dirt and bugs. Normal pressure on a good working system needs to be right at 25 to 40 PSI on the low side and 200 to 225 PSI on the high side. .