I noticed today that My ac has stopped working the fan blows the air but the ac dosent seem to engage no cold air any idea on what can be the reason... a bad compressor or a blown up fuse/relay if anyones knows the fuse number that would be a great help

Thank you

 

You need an auto AC specialist or a Lexus dealer to diagnose the problem. Could be any number of issues - blown compressor, bad clutch, blown fuse, leak in the system, etc, etc.

 

Start your car while holding the big auto button and the recirculate button at the same time. Wait until ALL the lights flash before letting them go. The AC temp display will flash 2 digit codes, post them here.

 

Ok i was doing it wrong sorry

Its showing me 21 23 24 55 56 59

 

Ignore 21 and 24 those are for the solar sensors. 23 is the code for the AC pressure sensor circuit which means your freon is probably low. 55/56 are the driver/passenger air outlet damper for the foot defroster and 59 is the max hot bypass damper.

 

So i guess my problem is code 23 low freon but i think there will be a leak because all of the sudden it stopped working for me

 

It should be easy enough for a competent shop to find the leak if you've lost enough freon to set off the pressure switch code. I had this code when my system was empty after changing the heater core.

 

These cars are so complex that sometimes you dont even know whats gonna happen next lol .. will take my car soon to some good shop and see what can they say about the leak .. that was alot off help with the self diagnostic method you told me about thank you for it

 

Your welcome, we are all here to help each other.

 

update
First of all once again a huge thanks to sha4000

after getting the codes details i.e low freon i went to a local shop they told me there is a leak in the system . It was the ac compressor washers that were leaking got them fixed today and ac is running good

 

Glad you got it taken care of without too much hassle. If you don't mind me asking how much did they charge for the job?

 

Ok so i need to give some details here the first shop tried to find the leak and said that my evaporator is leaking and they will charge me 800$ i was not sure if he knows whats hes saying so i left and went to the other shop. They were able to find the leak and charged me 300$ just to remove the 2 washers and fill the freon i left from there and ended up at one of my old friends garage he charged me 30$ for fixing the leak and charging the freon

 

So the first shop basically tried to scan you then the second shop actually found the problem but was charging too much in your mind. You then went to your friend and told him what the issue was and he helped you out which only costed you $30. If so then I applaud your efforts at saving money while getting the problem resolved.

 

Yup yup .. Thats is why i am feeling happy today