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Peter Bagley
Peter Bagley, Toyota mastertech
Category: Ford
Satisfied Customers: 205
Experience:  master tech at Toyota dealer
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Pressure high on low press side at idle. air temp warms up

Customer Question

pressure high on low press side at idle. air temp warms up also. air at went gets cold when driving or rpm is increased
JA: Have you checked the coolant level? Have you checked for a leak in the radiator?
Customer: air conditioner low side press high at idle...vent temp warms up..
JA: What is the model/year of your Ford?
Customer: 2003 e150
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes...checked 134 charge
JA: Anything else you think the mechanic should know?
Customer: air conditioning good when driving or rpm is increased while parked
Submitted: 2 months ago.
Category: Ford
Expert:  Peter Bagley replied 2 months ago.

Hello and welcome to just answer and allowing me to assist you. you said pressure high on low side? obviously you have a manifold Gage to test A/C pressures? can you tell me what the pressures are on both high and low at idle and 2500 RPM so we can proceed with diagnoses. Right now with just that info could be either a stuck expansion valve or internal compressor leak.

Customer: replied 2 months ago.
only have a service gage for low pressure side...only has color bands. pressure in green at higher rpm...goes into red at idle
Expert:  Peter Bagley replied 2 months ago.

Without knowing both side pressures at those RPM's it is only guessing and could be a costly guess. could be as simple as an over charge to an internal leak. If you require further assistance I'll be happy to do so.