Hello, First post here. I'm Seth.
I have a 2012 VW TDi
Here's the issues I'm experiencing; A/C blows decently cold when ambient temperature is below about 95 degrees F, but seems to take some time and driving before blowing cold.. Above that temperature, it doesn't seem to work much, if at all. Also, the compressor never cycles off and on. It runs constantly, unless I turn the A/C off which disengages the clutch as it should.
Here's what I've tried; I put one of those cheapy gauges (the type that comes with the Arctic Chill brand refrigerant) on the low side while the system was running and it indicated almost all the way in the red. (about 100F that day/time) So, I let pressure out until it was in the green (judge if you must). No improvement. Added a little back in the system.
Next day, same ambient conditions, I put the actual A/C gauge set on the car. Compressor engaged, low side is 55psi, high side 150. Constant and steady, no fluctuation in pressure at all. I googled what pressure to expect and one source says (for this temperature) the low side should be 50-55psi and the high side around 300. Another source said the low side pressure should be about the same as the temperature. So, some discrepancy there. I decided to add more refrigerant which brought both pressures up by 5 psi. it's now 60 low side and 155 on the high side. No improvement in performance.
Also, when the A/C is shut off the system normalizes to about 120psi in a minute or so. Not too long. Definitely no longer than 2 minutes.
So, I have my guesses, but would like to hear your opinion and experiences. What do you think the issue is?
Thanks guys.
-Seth-
I have a 2012 VW TDi
Here's the issues I'm experiencing; A/C blows decently cold when ambient temperature is below about 95 degrees F, but seems to take some time and driving before blowing cold.. Above that temperature, it doesn't seem to work much, if at all. Also, the compressor never cycles off and on. It runs constantly, unless I turn the A/C off which disengages the clutch as it should.
Here's what I've tried; I put one of those cheapy gauges (the type that comes with the Arctic Chill brand refrigerant) on the low side while the system was running and it indicated almost all the way in the red. (about 100F that day/time) So, I let pressure out until it was in the green (judge if you must). No improvement. Added a little back in the system.
Next day, same ambient conditions, I put the actual A/C gauge set on the car. Compressor engaged, low side is 55psi, high side 150. Constant and steady, no fluctuation in pressure at all. I googled what pressure to expect and one source says (for this temperature) the low side should be 50-55psi and the high side around 300. Another source said the low side pressure should be about the same as the temperature. So, some discrepancy there. I decided to add more refrigerant which brought both pressures up by 5 psi. it's now 60 low side and 155 on the high side. No improvement in performance.
Also, when the A/C is shut off the system normalizes to about 120psi in a minute or so. Not too long. Definitely no longer than 2 minutes.
So, I have my guesses, but would like to hear your opinion and experiences. What do you think the issue is?
Thanks guys.
-Seth-
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