AC will not stay cold?

How do you clean it or vacuum it? Wheres it located?
Thanks

Brought in twice and they did not solve problem. I would like to do myself but cannot find drain tube?

I have a 1994 Camry and every time I forget to put up my sun shade or I am on a longer trip, and the sun is shining hot on the dashboard, the air conditioner stops working. This last time it actually blew hot air. I turned the AC off, stopped the car and waited for 40 minutes. When I started the car again, the AC blew very cold. My mother had a Lexus that had a similar problem. Is this a Toyota issue?

I had a similar problem, Camry 95 AC not working when hot. The problem was the "Fan speed" control on the dashboard. I discovered that when wiggling the knob the fan was turning on and off even if the knob remained in the "Auto" position. By removing the switch and disassembling it and carefully cleaning the switch the AC now appear to work all the time regardless of ambient temperature and wiggling the knob doesn't affect the fan speed. Time used was about 1.5 hours including figuring out how to disassemble the dashboard panel to remove the climate controls. Note there appear to be different types of climate systems in the Camry models. Mine has the push buttons for air flow selection and the fan speed control has OFF, AUTO and Low to High.
Hope this helps.

A/C clutch and fans initially started clicking on and off quickly along with the fans and also the light in control button blinking and corresponding warm and cold air from vents. I am a mechanic and I am pretty certain no refrigerant has leaked out as I have dye in my system and I monitor/inspect my car three times weekly and no leaks visually. There is still pressure at valve core fittings when slightly pressed to check. With possibly no refrigerant escaping out and the clutch clicking on and off until now, not at all. I need help to troubleshoot.

The one thing I forgot to mention is that the green light in the control button does not even come on or flash at all and that was one of the first things I noticed. Do you have an electrical schematic for the A/C system? What is the control head? Also, for example if I evacuate the system and try to refill it and the compressor clutch with not engage due to something faulty. How can I fill it? Is it possible you can help me troubleshoot the electrical portion of the system a little first? Verify some of the electrical items first? I would like a little help with that first.

The A/C switch is a button only. The temperature, vents etc, are all dials and a lever for the re-circulation/outside air. Yes, thanks I need help checking the fuses and electrical.

Is there a better way to attach the image of the diagram? I am having a hard time reading it. It seems to be small. Is the rpm sensor on it? Also, I do know that before my A/C clutch completely stopped working the clutch and fans would energize simultaneously. Possibly both fans not one. But I do know that the fans turned on and off abruptly/quickly as well as the clutch. Also at this time the A/C button green light would not illuminate but the switch did turn on and off the clutch/fans.

This is the kind of control panel I have. I still do not understand what they mean by push button or lever type. I was able to find a diagram online and there are two different diagrams like you said, one for push button and one for lever type and I am not sure what they mean. That is why I took a picture of my control panel.

My car is a 2.2 L, 5S-FE engine.

I looked at my relay under hood by the air cleaner, drivers side front. Relay looks like it was cycling on and of a lot because it was blackened a little on the contact area. I removed it and checked it with battery voltage and a test light and the coil is working and allows power to transfer through and holds. Also, I have a 1992 parts car with lever type and I took that relay from the parts car and installed it and no difference. I did notice that the parts car AC switch light works even with or without the relay installed so that leans me towards the AC switch in dash control panel because my car initially had the problem of only the AC light not coming on, but AC system worked fine and AC blowing cold. I did hold down contact of the exposed relay with engine running and AC compressor clutch came on and air started to come out cold quickly.

Schematic I have also.