Lexus GS350 Fsport awd. AC stopped working?
09-06-23, 05:54 AM
#1
Driver School Candidate
Thread Starter
Lexus GS350 Fsport awd. AC stopped working?
Hello ! We have 17' 350 F sport awd with 71k miles...
yesterday my wife came from work and she said the AC doesnt working ...
so I went and bought just in case freon 134a ..
Can someon tell me ..what to check first ?
yesterday my wife came from work and she said the AC doesnt working ...
so I went and bought just in case freon 134a ..
Can someon tell me ..what to check first ?
09-06-23, 06:10 AM
#2
You shouldn't be buying refrigerant if you don't know how to start troubleshooting the problem, I would start with making sure your wife had it turned on properly.
09-06-23, 06:16 AM
#3
Driver School Candidate
Thread Starter
Btw having car since brand new... in 17' .. you should assume people know how to use it...lol
and stopped means it work before ..
no pressure just saying common sense...
and stopped means it work before ..
no pressure just saying common sense...
09-06-23, 06:23 AM
#4
09-06-23, 09:59 AM
#7
Intermediate
You bought the can with a gauge or just a can off the shelf?
Because the one with a gauge, sure, you can put enough in there to make it work again if it leaked... but you don't always want to do that as if you don't know where it leaked from you may just be pissing in the wind.
There is a sight glass under the radiator cover trim under the front hood for the high pressure side. You may see some bubbles there when the AC is trying to run. I'd take a look and see if you see anything through the glass when you have it turned on too.
Because the one with a gauge, sure, you can put enough in there to make it work again if it leaked... but you don't always want to do that as if you don't know where it leaked from you may just be pissing in the wind.
There is a sight glass under the radiator cover trim under the front hood for the high pressure side. You may see some bubbles there when the AC is trying to run. I'd take a look and see if you see anything through the glass when you have it turned on too.
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09-06-23, 10:30 AM
#9
Lexus Test Driver
I'm gonna pull up a chair and watch this unfold!
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jgscott (09-06-23)
09-06-23, 11:16 AM
#10
You go messing with that Freon without experience and a gauges you are asking for extra problems and trouble especially if you are not experienced.
Here is a common issue all of a sudden a/c not working with Toy/Lex. The Air Conditioning Compressor Flow Sensor switch. I gave a letter to a long time Lexus service Director to talk to Lexus about. On this problem the Denso compressor is still good. It's just the dumb flow sensor switch won't kick in the compressor to start working. This may or may not be the problem?
A quick check is to disconnect the battery with the a/c off while the car engine is cold, for about 10 mins. Reconnect the battery then cut the a/c on. You can also get a flash light and look down at your compressor to see if the clutch is turning or not, I think. You are trying to get the sensor to switch on again. I get mixed up from many different Lexus model and engines I have had before. If it does not kick on the 1st time you may want to do it again once or twice over to see. A shop can also see the milliamps =/- reading to tell if the Sensor is reading within it's specs.
This may not be the problem but, most time when all of a sudden it stops working it is. You can also google Toy/Lex Air Conditioning Compressor Flow Sensor switch problems. Its also not such a easy repair IIRC. It would save the cost of a whole new compressor though.
Here is a common issue all of a sudden a/c not working with Toy/Lex. The Air Conditioning Compressor Flow Sensor switch. I gave a letter to a long time Lexus service Director to talk to Lexus about. On this problem the Denso compressor is still good. It's just the dumb flow sensor switch won't kick in the compressor to start working. This may or may not be the problem?
A quick check is to disconnect the battery with the a/c off while the car engine is cold, for about 10 mins. Reconnect the battery then cut the a/c on. You can also get a flash light and look down at your compressor to see if the clutch is turning or not, I think. You are trying to get the sensor to switch on again. I get mixed up from many different Lexus model and engines I have had before. If it does not kick on the 1st time you may want to do it again once or twice over to see. A shop can also see the milliamps =/- reading to tell if the Sensor is reading within it's specs.
This may not be the problem but, most time when all of a sudden it stops working it is. You can also google Toy/Lex Air Conditioning Compressor Flow Sensor switch problems. Its also not such a easy repair IIRC. It would save the cost of a whole new compressor though.
09-06-23, 03:55 PM
#12
Intermediate
09-06-23, 04:27 PM
#13
I just had an issue with this in my 15 GS350. Do this, with the A/C switched on while the engine is running and by making sure the clutch on the compressor is engaged. Hook up just the guage with the can not attached and see where the low sides system pressure is at currently at. If low or at "Add Refrigerant" level, then follow instructions on can to add freon. If low side pressure is too high, squeeze trigger and bleed off until pressure from low side is back into optimal levels. I released to much pressure when i did it the first time but had a brand new can like yourself so i just filled it back up and boom, blows ice cube temp air out now. Some of the processes i just mentioned above are not legally recommended, but they worked for me 👍🏻.
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Mangsailor (09-07-23)
09-07-23, 08:57 AM
#14
Driver School Candidate
Thread Starter
Ac compressor not engaged all time ..doesn't respond at all ..
anyway thatk you i will check with Lexus mechanic on..
thank you all for trying help me.
I wont post anything more..
anyway thatk you i will check with Lexus mechanic on..
thank you all for trying help me.
I wont post anything more..
09-07-23, 09:02 AM
#15
Driver School Candidate
Thread Starter