My air conditioning keeps shutting down. I know I

too much freon in the system or the engine is running too hot. Freon is extremely sensitive to temperature so if the radiator is too hot it will create a high pressure situation and the system will shut off. the same holds for an overfilled system. if neither of those conditions exist, then a new sensor or sensor calibration will solve the problem (I don't know which system we're talking about; some sensors are settable)

Hello,
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Let me explain in layman's terms how the air conditioning (AC) system works and what could be happening to your car.

Like your body, the air conditioning compressor is the heart of the AC system, and Freon is the blood. The compressor pumps Freon throughout the AC system, either the older type R12 which costs as much as gold it seems these days, or the new environmentally-friendly R134A Freon. This Freon is a gas and liquid combination that is compressed and circulated throughout the air conditioning system. The compressed Freon is pushed through the system under pressure and is passed through different sized metal and rubber hoses and a special valve called an expansion valve that cause the gas to expand and contract.

This expansion and contraction makes the Freon gas very cold. This cold gas makes its way via metal lines into the dash area of your vehicle to the evaporator core. This evaporator core is like a small radiator, except it has cold Freon circulating inside and not hot antifreeze. A small fan (the AC blower fan which you control from the control panel on the dash) sits in front of the evaporator core and blows air across this cold evaporator and then through the vents inside your vehicle.

The other objective of the air conditioning system is to remove the heat from inside the cab of the vehicle. This heat is removed by the Freon with the help of the AC condenser located at the front of the car (usually in front of the radiator). The Freon coming back from the evaporator carries the heat from the cab to the condenser via rubber and metal hoses. Just like your radiator, the condenser is lightweight aluminum with many internal winding coils.
The Freon travels through these coils, and in between these coils are small slits or fins that the Freon is forced through. The condenser will have an electric cooling fan mounted in front or behind it to push or pull air through these fins to remove the heat from the Freon. Some vehicles still use the old fashioned fan blade driven by the engine to pull air across the radiator and the condenser.
Now I know that is just a tidbit of information on how the air conditioning system works, and it is very general, but I wanted you to know what to look for to give you insight as to what might be happening with your vehicle.
A few causes of low cooling efficiency or no cooling at all at idle are:

Lack of air flow across the condenser. Make sure the electric cooling fan motor near the condenser is coming on, or in models that are equipped with a fan blade make sure this fan is turning and is turning very fast.

Low Freon levels. Freon level and pressure should be checked by your certified air conditioning mechanic.

Overheating. If the engine is running hot or overheating, it can have a noticeable negative affect on the air conditioning system. Some cars have two electric cooling fans, one for the air conditioning condenser and the other for the radiator. Make sure they are both working properly. Usually at idle on a hot day with the AC on both fans will be on.

When the vehicle is traveling at freeway speeds, the compressor is pumping the Freon throughout the system much faster and harder than at idle. There is a dramatic increase in air flow across the condenser due to 55 mph winds, and the engine is usually operating at a cooler, more efficient temperature as well, thus allowing the air conditioning system to operate efficiently.
Note: An air conditioning system that is somewhat low on Freon can still feel comfortable at freeway speeds due to the added air flow across the condenser which can overcome the ill effects of slightly low Freon. Periodic air conditioning performance checks by your mechanic are the best way to keep the system in great shape.

Hope this helps.

Goodluck

Honda Accord are equipped with dual cooling fans in the engine bay.The primary fan's job is to pull air across the radiator; the secondary fan draws air across the air conditioning condenser.
The procedure to replace the condenser fan is as follows:-- Raise the hood and disconnect the negative battery cable using a battery terminal wrench. Shine a flashlight down onto the condenser fan assembly to locate the wiring harness to the fan motor and the three bolts holding the fan assembly in place.
Disconnect the wiring harness from the fan motor and move it to the side.Remove the bolts from the top and bottom of the fan assembly, located in the shroud, with the socket set.Lift the old fan assembly upward and out of the engine well carefully. Avoid catching it on any wiring or other engine components.Lower the new fan assembly into position and thread the bolts in. Reconnect the wiring harness and negative battery cable in reverse of removal.
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You may want to have your fan clutch checked. If the fan on your water pump does not spin very hard when the vehicle is idleing than it doesn't draw air through the condenser and that air keeps the condenser cooler plus it keeps the pressure down on the high side of the ac system. leave comment.

SECTION 412-03: Air Conditioning 2003 Escape Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 05/21/2002 Condenser Core Printable View (52 KB) Removal and Installation
NOTE: Installation of a new suction accumulator is not necessary when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.
NOTE: If an A/C condenser core leak is suspected, the A/C condenser core must be leak tested before it is removed from the vehicle. For additional information, refer toSection 412-00.

1. Recover the refrigerant. For additional information, refer toSection 412-00.

1. Remove the front bumper cover. For additional information, refer toSection 501-19.

1. CAUTION: Plug all ports to prevent contamination from dirt or moisture.
   Remove the nuts from the two condenser core air conditioning line (peanut) fittings.

1. Remove the screws and the A/C condenser core brackets.

1. NOTE: When removing the A/C condenser core, disconnect the two air conditioning line (peanut) fittings from the A/C condenser core.
   Remove the A/C condenser core.

1. To install, reverse the removal procedure.
   • Lubricate the new A/C condenser core with the correct amount of PAG Compressor Oil YN-12-C or equivalent meeting Ford specification WSH-M1C231-B. For additional information, refer toSection 412-00.
   • Lubricate the O-ring seals with PAG Compressor Oil YN-12-C or equivalent meeting Ford specification WSH-M1C231-B.

the aircon gas needs recharging in a car at least every 3 yrs.you also need to run it for at least 15mins a day(on average)to keep in tiptop condition.also dont forget to spray air con cleaner into air intake of heater to get rid of legionaires bug(really!!! )

THE COOLANT FAN OR THE ONE THAT IS PROBABLY NOT WORKING IS THE CONDENSER FAN. THIS FAN PULLS AIR ACROSS THE CONDENSER TO COOL THE HOT FREON GAS SO IT CAN BE CONVERTED BACK INTO A LIQUID, THE PROBLEM IS IF THE FAN IS NOT WORKING THEN IT WILL NOT COOL DOWN AND THE INTERNAL PRESSURE WILL BE TO HIGH AND THAT IS WHY THE A/C WILL NOT WORK AT IDLE. WHEN YOU ARE DRIVING DOWN THE ROAD YOU ARE PUTTING AIR ACROSS THE CONDENSER BUT WHEN YOU STOP THE AIR STOPS. TO KEEP FROM DAMAGING YOUR A/C SYSTEM YOU WILL WANT TO GET IT FIXED AS SOON AS YOU CAN. CHECK AROUND TO SEE WHO HAS THE BEST PRICE.

You could remove fuse 25 (30amp) in the underhood fuse panel, but then no blower for AC, heat, or defrost. Need to replace blower regulator.

i dont know anything about the chevy aveo But i purchased a toyota truck years ago without air conditioning and had the dealer install factory a/c and only took 3 hours for the whole thing .

The condenser is part of your air conditioning system. Hot high pressure freon gas from your air conditioning compressor will run through your condenser to dissipate heat and condense into a liquid.
The condenser is not in the radiator but looks like a small version of your radiator mounted either in front of, or behind your main radiator.
If your AC works properly and doesn't leak, then you don't need a condenser.