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david craig
david craig,
Category: Dodge
Satisfied Customers: 865
Experience:  owner/mechanic at 3D Automotive
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I recently replaced the front evaporator on my 2007 dodge

Customer Question

I recently replaced the front evaporator on my 2007 dodge Durango. after evacuating the system and recharging all I get is hot air. the readings are 40lb on the low side and 200 on the high side the compressor is on but the suction side stays hot. I replaced the expansion valve but nothing. I by passed the heater core same results.
Submitted: 4 months ago.
Category: Dodge
Expert:  david craig replied 4 months ago.

Hi Im David, the low pressure line is ok to be hot. the high side needs to be cold and sweating as it goes into the evaporator.

Expert:  david craig replied 4 months ago.

do the pressure switches cylcle on and off at the correct pressures?

Customer: replied 4 months ago.
the low and high are both hot
Customer: replied 4 months ago.
how are the pressure switches are supposed to cycle
Expert:  david craig replied 4 months ago.

after the receiver/drier before it goes into the firewall?

Expert:  david craig replied 4 months ago.

the low side is supposed to kick on at around 20 and kick off around 40-45. then the high side takes over and will kick off around 250-300 and come back down waiting to kick on again and so on

Customer: replied 4 months ago.
I will get back to you when I am back with the car
Expert:  david craig replied 4 months ago.

sounds good

Expert:  david craig replied 4 months ago.

any update?

Customer: replied 4 months ago.
you got it backwards, the low pressure is cold, the high pressure hot. anyway I took care the problem
Expert:  david craig replied 4 months ago.

no sir. after the high pressure passes through the orifice tube or expansion valve it is cold. what did you do to fix the issue?

Expert:  david craig replied 4 months ago.

I am glad you fixed the issue and here is a typical ac system. have a good day.

Expert:  david craig replied 4 months ago.

If you could leave a good rating for my assistance i would appreciate it. even though you believe i had it backwards the diagram and my experience confirm my answers, thanks take care.

Expert:  david craig replied 4 months ago.

have a good week