Engine Size: 2.3
Refrigerant Type: r134a
Ambient Temp: 103
Pressure Low: 32
Pressure High: 275
Country of Origin: United States
I have two questions.
First, when I go on long drives (over an hour) my vents will stop blowing. I can hear the fan running but there is no air coming out. I can press the ac button to turn off the compressor and air will start blowing through after a minute or two. I am guessing that my evaporator is freezing over. I have checked to make sure that the evaporator is not dirty or blocked and my drain is clear. A ford tech told me that he thought the "cycling switch" was bad. I can't tell if my compressor is ever turning off when driving. But I do know that when I recharged the system that the compressor wouldn't kick on until I had enough charge in the system.
I tried to order a new cycling switch but found out that they are back ordered and I can't get one.
Even though I can't get a new switch.. Does it sound like this is the cause of my problem?
Second, I had my ac recovered and then evacuated and recharged it myself. I used a scale and am fairly certain I put the right amount back in. With the exception of long drives my ac seems to work well. I have been looking for factory specs or pressures for my car to compare it with what mine is reading at. I never checked my pressures before I had is evacuated.
At an ambient temp of 103 and the car idling at 700rmp my Low is 50 and my High is 250. If I hold the rpm at 1500 for a few minutes is stabilizes at a Low of 32 and a High of 275.
The ford tech also told me my pressures should be about 35 for the low and 100 plus the ambient temp for the high...
Based on what he told me, I would think my High side is way to high. But I was hoping to find some factory specs. I have tried AllData but couldn't find anything.
Are my pressures okay?
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