When the temperature is very hot outside, the power steering stops working.

Check the relay. If it's in not so good condition it'll over heat and stop power to the pump

Do you mean the engine overheat warning? The power steering problem is most likely a defective steering rack, they always act up when hot due to internal seal leakage and fluid bypassing the seal.

As a first step, use a child's toothbrush to scrub the channels clean. This has worked on other cars with window binding problems.

On some Camrys the radiator fan is run by hydraulic pressure from the power steering pump. I think the sensor you mention is the engine coolant temperature sensor, which is in the circuit which operates the fan when the engine becomes hot. If this fails the engine will overheat, yes. The fan does not cool the hydraulic fluid from the pump.

If your power steering fluid gets low the same thing can happen, but you would notice immediately as the steering would become intermittently harder.

YOU HAVE A RUPTURE PRESSURE LINE IF YOU HAVE NO POWER STEERING FLUID IN THE POWER STEERING RESERVOIR.LOCATE LEAK THEN BLEED POWER STEERING SYSTEM BY ADDING POWER STEERING TO RESERVOIR.DONT OVER FILL BY FULL COLD MARK ON POWER STEERING DIP STICK.ADD FLUID TO RESERVOIR WAIT A 2 MINUTES.CHECK FLUID LEVEL AGAIN.WHEN POWER STEERING FLUID LEVEL STOP DROPPING.START ENGINE LET IT RUN FOR 10 SECONDS.THEN TURN OFF ENGINE CHECK POWER STEERING FLUID ADD FLUID IF FLUID LEVEL DROPS. WHEN FLUID LEVEL STOP DROPPING.SAFELY RAISE SUPPORT VECHICLE FRONT WHEELS.START ENGINE.NOW TURN STEERING WHEEL GENTLY FROM STOP TO STOP MEANING LEFT TO RIGHT DONT HOLD IN POSITION.LET THE STOP TO STOP BE QUICK.CHECK POWER STEERING FLUID AFTER YOU HAVE TURN STEERING WHEEL ABOUT 7 STOP TO STOP.WHEN FLUID LEVEL STOP DROPPING YOU AT HOT MARK ON DIP STICK BLEEDING PROCESS COMPLETE.TURN OFF ENGINE LOWER VECHICLE BACK TO GROUND WAIT ABOUT 5 MINUTES CHECK YOUR FLUID LEVEL.IF FLUID LOOKS LIKE A TAN COLOR.YOUR POWER STEERING SYSTEM FULL OF AIR.TURN OFF VECHICLE LET VECHICLE SET A LONG WHILE TO AIR BUBBLES SETTLE DOWN LOOK FOR LEAKS AROUND POWER STEERING PUMP FRONT SEAL AND CHECK FOR LEAKS AROUND POWER STEERING LINES.

I have a 1977 Cadillac Seville and it does the same thing, and when the outside temperature drops below 65 degrees the horn will sound continuously until either the horn relay or the horn fuse is removed.

The problem is in the horn pad on the steering wheel, and the contact plates inside of the horn pad are too close together (a manufacturing defect) and when the temperature drops down to a certain degree then the horn pad will contract and cause the metal contact plates inside of the horn pad to touch and make contact, and it is same thing as if you were pushing on the horn pad.

I have also heard of the exact opposite happening and when the temperature gets too hot the horn pad will expand and cause the metal contact plates to touch and make contact and activating the horn.

It sounds like the power steering motor is overheating pre maturely. Changing the motor should take care of the problem. What really happens is the motor reports to the power steering module that it is over heating and the module is shutting power to the motor down, the motor is actually no overheating.

Power steering module seems to be bad. Only fix is to replace it .Not a cheap item. About 250-300 dollars for the part. Shop the internet 4 a better price

warranty should be good at all chevy dealers
take it back

I am a volvo s40 owner myself.
Try to eject all of the CDs at once. To do so keep the eject button pressed for a few seconds. this will eject the CDs one by one.

The temperature of the air conditioner is probably changing because of the outside temperature change. eg if the temperature outside is 35C and you set the temp inside at 25C it will come out cold air. if the temperature outside drops to 30C the air will come out hotter. you will notice that between summer and winter. the same temperature set will give either cold or hot depending on the weather.
in winter if you set it at 25C it will be very hot. In summer it will be cold.