Hi
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.
viewtopic.php?f=3&t=33025
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.
Regards
Jos
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.
viewtopic.php?f=3&t=33025
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.
Regards
Jos
