If my air conditioning condenser is damaged and the air conditioning system now fails to blow chilled air, is this a loss of Freon? If so its poisonous, so I am under the impression I should not attempt to change the condenser? But if the Freon gas is lost then surely its safe to fit a new condenser and then get it charged?

depending which lines you are touching lines going into condenser and out are hot hot lines going into evap and out are hot and cool

If you mean the vents on the dashboard that are supposed to blow cold air if the air conditioning is on, and hot air if the heater is on, then here is a part answer, just for this problem I described.
No cold air could mean there is no gas in the air conditioning system.
The gas is called "freon" in the US, however we no longer use "freon" itself because of environmental poloution. We now use a substitute whose number is 134a.
There could also be some part failure preventing the air conditioning system from activating.
Some parts that fail could be the condenser, the evaporator, the receiver/dryer, one of the hoses or pipes, and the compressor.
A technician should be able to check all this out and give you a good answer.
God bless your efforts.

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

Hi,

When your car air conditioning is blowing hot air, this means that refrigerant cannot absorb the heat coming from your car passenger compartment.

This kind of problem often cause by a refrigerant leak or a clogged condenser.

If you have a steady reduction of cold air from your car air conditioning system, the possibility is that the refrigerant is slowly leaking out of the hose or seal.

Another reason for the gradual reduction of cold air produce by your car air conditioning system is the clogged condenser but this is only a contributing factor.

To solve the problem you are experiencing, you must first check the condenser for dirt, debris or bug that is building up outside the car condenser, this is the part that is like a mini-radiator mounted in front of your car radiator;
Try to clean this with a soft brush also, spraying with pressurized water will do. This will improve your car air conditioning problem.

However,if the problem persists,it means you have to refill your airconditioner compressor with a refrigerant(freon gas).

Good luck!!!

its a high pressure pump for freon gas ,200lbs output

Initially I would suggest a Loss of FREON from the system, but there are also several reasons for the A/c to quit. Freon loss,[Leaking seal, Comp. front shaft seal, Split hose, Holed Condenser, Compressor Realay/Fuse failure, Thermo couple switch].
An easy out, is to Purchase 1 can of Freon with added Lubricant and 1 Can of Pure freon.
Inject the 1 Can with Lube into the High Pressure Side Adaptor Port. Look and Listen for Leaks. Start up, with Blowers on FULL speed, A/c Control on Max. A/c, and Heater Coolant Control on Cold[Blue]
Speed up the Engine to about 1500 RPM. Look to see if the Compressor Clutch on the Front is Engaged and Rotating, if it does wait about 30 seconds, and the Condenser Fan should Engage, continue to run the engine and check the Interior of the Vehicle for a change in AIR flow temperature. If it is cool, but not cooler. Stop the engine, and give about 2-3 minutes before adding more Freon from can 2.
If none of this happens to make it work, then I suggest you go to a Reputable A/c Repairer and ask for a CHECK & ADVISE ONLY,on your vehicle, so as to get an ESTIMATE, for repair of what is apparently defective in the system.
Regards,DT

I think you may have a clogged orifice tube (possible compressor failure starting) this can be checked with a system pressure test.
When an expansion valve or block fails, always replace the drier. Also flush the condenser and liquid lines.

The A/C system has a pressure switch will keep the A/C from running if the freon is low. It prevents damage to the A/C compressor from low freon.
My bet is you'll need to recharge the freon in the A/C system.

The A/C system has a pressure switch will keep the A/C from running if the freon is low. It prevents damage to the A/C compressor from low freon.
My bet is you'll need to recharge the A/C system.

Could be the expansion valve. That's what allows the temperature to actually drop in the system - the contents of the AC system are under pressure, and are at a certain temperature. When the freon goes through the expansion valve, the pressure drops suddenly and dramatically, which "flash chills" the freon, allowing the air to blow cold. If it fails, you may get lukewarm air from the AC despite everything else working. Also though, check to see whether the AC evaporator fan (underhood) is working - on some cars, if it doesn't turn on, the compressor won't be run enough to cool the air.