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No, the EAS is fine, now it's the AC

1420 Views 7 Replies 5 Participants Last post by  flamecycle
Just a few seals here and there, and a quick reset with one of Storey's cables, and the air bags are inflating like they should.

Now it's the A/C. I'm finding that it quits working when the temperature gets above about 90 degress f. or so. It sounds a lot like the three way switch adventures listed here http://rangerovers.net/newrremedies.htm#airconditioning on the common fixes page. When the temperature is lower, the A/C runs like a champ for hours on end. I've had it recharged, pollen filters are cleaned (although my new ones are on order since I'm due for my annual filter swap).

Has anyone had similar symptoms caused by anything BESIDES the 3-way switch? And when I go to swap this thing, I'm suspecting the system will need to be evacuated, right? Shop manuals are not exactly clear on this point.

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Just posted a reply regarding the overfilling with gas.

Too high pressure (is the same as too high temperature) in the condensor is most likely the cause. Check the temperature with an infrared temperature reader and compare it to a similar car with proper functioning AC.


Too much gas can give the symptoms you are describing. Of course it can also be the switch itself that is triggered too early.
Proplems with the heat transfer in the condensor like blocked or bend fins, not proper working fan etc leads to the same too high pressure in the condensor.

For reference you might want to look in the diagram like:

http://www.ent.ohiou.edu/~me321/quiz.in ... _r134a.gif

In the banana shape the properties of liquid and gas together are displayes with the upper line 100% gas and the lower line 100% liquid. You can see that the temperature is constant at a constant pressure within the banana. If you download a more detailed HS diagram you can exactly pinpoint what pressure you have in your condensor and even check it with the pressure gauge at the gas filling station. If pressure and temperature are not matching the data from the HS diagram you might have the wrong refridgerant or the system was not properly vacuumed before it was filled.

I hope this explanantion helps.


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