Engine Size: V6
Refrigerant Type: 134a
Ambient Temp: 95
Pressure Low: 40
Pressure High: 250
This car cooled great last season -- vent temps in the upper 30s after run-in -- but now it's barely dropping below 60 (center vent, max setting) at idle and up to 1500 RPM.
With the gauges on, I run it up to 1500 and get the high side up to 300 but the low side barely moves -- stays about 40. Also the compressor doesn't cycle.
On the highway I can get the vent temp down to 48 and there is rise-and-fall, indicating it's cycling.
I checked the condenser for obstructions and bent fins. The compressor and dryer were changed out 3-4 years ago and correctly vacuumed and recharged.
What should I try next?
Might check that the hot water shutoff valve is working or that you are not getting hot air mixed with the cool.
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