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AC Stops working after 20 minutes 10 miles.

8C 361 on Sun August 02, 2015 12:11 PM User is offline

Year: 2000
Make: Subaru
Model: Forester
Engine Size: 2.5
Refrigerant Type: 134 A
Ambient Temp: 90
Pressure Low: 30
Pressure High: 250
Country of Origin: United States

AC works fine for 30 min, 10-20 mi. or so. Compressor is still turning. If it is turned off for 5-10 min. it works again but not as well. YesterdayI had gauges on it when it quit.Low pressure slowly dropped to 0 and even slight vacuum. What does this mean.
I ordered a new TVX from this site but it would not fit so did not get changed. The old one looked OK. I do not understand how it works.
Or could it be the condenser?

mk378 on Sun August 02, 2015 12:45 PM User is offline

This is almost always the TXV getting stuck in the closed position, so find the right one and change it.

A TXV measures evaporator temperature and pressure, and controls the refrigerant flow for optimal cooling by keeping the evaporator almost full of liquid but not completely. Too much flow will let liquid reach the compressor and damage it.

8C 361 on Tue August 04, 2015 10:41 AM User is offline

Thank you for responding tk.

8C 361 on Tue August 04, 2015 10:44 AM User is offline

Sorry, thank you mk376.

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