Question1996 Chrysler Sebring Convertable 2.5L V6
Car in idle/park, outside air temp. 74f, AC on low setting I get 51 degree air from the vents. (seems normal) The low side guage reads between 5-25psi When the guage gets to 25psi the rad. fan turns on and the guage drops to 5psi. It takes about 30 seconds for this to happen and it continues over and over. Is this normal?
With the AC blower on high, the rad. fan is on the entire time. The low side pressure is at 38 and drifts down to 27, then back to 37 over and over. Is this normal?
My problem is that the air temp out of the vent is now 69-70 degrees F. If I shut off the AC after being on high, the low side pressure reads 80psi, Is this normal?
Why would the air be so cold at lower blower setting and not cold at high setting?
Freon w/ oil was added last year from a can.
Thank You for any help you can provide
AnswerAs to paragraph # 1: The inside air temp from the vents on low blower should be about 40 to 45 degrees coming out of the vents. As to the pressure readings they are pretty close to being correct.
As to paragraph # 2: The fan SHOULD run ALL the time when on HIGH blower speed. The pressures are fairly correct.
As to paragraph # 3: Once the A/C compressor is turned OFF both sides the LOW and HIGH sides will return back to almost equal pressures within 30 minutes and this IS normal.
As to paragraph # 4: Compare it to an ice cube in your hand. If you put it up close to your face with a very small fan blowing at the ice cube and the cold air is hitting your face the sensation is very cold.
However, If you put a large floor fan in place of the smaller fan the more air volume is going across the ice cube and the sensation of coldness will be much lower.
I hope this explains this question.
What you most likely have is to much refrigerant oil and not enough freon in the A/C system of which is WHY your pressures seem to be fairly close.
You could also have atmospheric air in the A/C system due to a leak of which is why you had to add freon to the system.
You could possibly have a restriction within the orfice tube/ expansion valve but the pressures seem to disqualify this possibility.
What you are going to have to do is have a fully qualified, experienced, reputable A/C facility do the diagnostics.
Without physically having the vehicle to look at and test, An EXACT diagnosis is most impossible.
The most usual causes are:
1. Air in the system.
2. excessive refrigerant oil.
3. partially restricted orfice tube/ expansion valve.
4. A/C-Heater DAMPER DOOR setting is incorrect.
What mechanical work or ANY kind of work has been performed on the vehicle recently ?. As most problems that occur after a recent repair was made can be traced back to the area of where the repair was made as a vacuum line may have been knocked loose or a wire connection came loose, Look around in the area where work was performed..
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