This thing is driving me crazy, compressor still turns but the cold air stops at high outside temps (95, 85 stayed on longer. I can turn ac off wait about a minute then it comes back on, then it repeats the cycle. Been re charged twice. Replaced the flow control switch (SnapOn said it was bad) has 40 psi on low side, 180 high. Released a little pressure today now it won’t blow cold at all, compressor still turns? ???

Year, make,model would be helpful. Guy I work with just fought with the bosses Lexus(2018ish?). It was doing the same thing and had a code for some flow switch. He dug through bulletins and found something about it. seems the switch alone wouldn't fix it? He ended up putting a compressor on it and all is well? I didn't get involved with it just trying to remember what he told me....odd one for sure.

After turning off the A/C for a while and turning it back on does the discharge air smell damp? If so, the evaporator coil is freezing and thaws after sitting a while.

I beleive the high (discharge) pressure should be higher at 95F ambient temp. Probably between 300-325 psig. You may be undercharged, have a leak or a compressor with capacity issues, possibly a leaking or broken compressor internal discharge valve.

I beleive the high (discharge) pressure should be higher at 95F ambient temp. Probably between 300-325 psig. You may be undercharged, have a leak or a compressor with capacity issues, possibly a leaking or broken compressor internal discharge valve.

I believe you are correct about the pressure.

I just noticed the post on the pressures. (has 40 psi on low side, 180 high.)

I agree the pressures are too low.

180- PSI high side will not cool with R134 at 95 degrees. 250 to 275 is my target and up to 300 on the high side.
Low side should be 40 to 50 psi or sometimes a little less depending on the AC system.

This is the chart I use and I tend to aim on the lower pressures for high and low sides when I charge.

Somethings way off, 80 on low side and 130 on high about 78 degrees outside.

OK, a little more info. Outside temp dropped to 80-82 after rain showers and it never shut down again (2-1/2 hours at 75-80 mph) so why does outside temp affect the AC? Is there a temp switch somewhere? I read above about his ‘hardbody’ turning off. I’m home so I’ll stick the gauges on later to get some accurate readings.

Somethings way off, 80 on low side and 130 on high about 78 degrees outside.

I would hook it up to the charge station and pull it down to a vacuum for about 2 hours to remove all moisture from the system. Your pressures are too low for a hot humid day. The symptoms do indicate an expansion valve freezing up and when it warms up it opens and lets the freon circulate again. I think you can access the expansion valve at the firewall on that car if the evacuate and recharge doesn't clear the moisture. The filter/drier is built into the condenser so you may have to replace the condenser for a proper repair. I have seen very few compressor issues on the Corolla and most of the time it comes down to a flow issue.

Gus