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Answered 2008-07-03 23:00:13

If the AC unit has a condensor check its pressure and make sure that it is working properly with the unit, I.E. condensing the warmer coolant quickly back to a useable form, otherwise recharging the refrigerant is pointless. Also, check your heater valve. It could be that your AC is working fine but when your vehicle gets warmed up then you're heating your nice cool air before you get a chance to enjoy it!


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The refrigerant is for the entire air conditioner system not just for the condenser units. First, this question is not specific! There is whole bunch air conditioner condenser. Each manufacture design different condenser capacity. I might come back to this question.

It contains no Freon. Freon has not been used since 1995. It contains R134a. If it needs recharging then you have a leak. It is illegal to add refrigerant to a system with a leak without first repairing the leak. As you cannot do this yourself, you need to take it to a professional for repair and recharging.

First thing to check is if it's icing over. If so, low on fridgerent.

He got the idea from refrigeration so refrigerant parts were modified.

First thing take the EPA test to prove you know how to Handel refrigerant in a safe and responsible manner, receive your certification then go to a HVAC&R supply house present your certificate and purchase the correct refrigerant .

First check to see if the system has freon in it and if not then you have a leak but if it does then you will need to check the electrical for the a/c system.......

It came from the factory with R12 Freon. Due to the high cost of R12, I suggest you convert it over to R134. Any good A/C shop can do this. Remember, it is illegal to release refrigerant into the atmosphere. It is also illegal to add refrigerant to a system with a leak without first repairing the leak.

You do not recharge coolant, you replace it. If you are referring to refrigerant in the A/C unit, then first you need to have the leak repaired. It would not need recharging unless it is leaking. It is illegal to add refrigerant to a system that is leaking without repairing the leak. This is a job for a professional with the proper tools and knowledge. This is not a DIY repair. The cost depends on where the leak is.

Because it uses air it sucks from the outside of the building, only it cools it down first before blowing it out.

Something like that happened to me and it was the alternator so I had to change it. ----answer---- When your vehicle is moving, more air is being moved across the condenser, which in turn cools the refrigerant. Could be that the system is incorrectly charged. I would have that checked first.

One reason is engine overheating - check your temp gauge and coolant as a first step.

The most common thing that will cause this will be a vacuum leak and you need to check all of the vacuum lines first..................

First, I would check and change my filter. A clogged filter will block the air coniditioner from blowing cold air. If that does not work, I would call an air conditioning specialist.

This is most definitely not a DIY task. To do it properly, you need to first test the purity of the refrigerant, which takes special equipment to do, as does actual recovery and storage of the refrigerant.

it contains no Freon. It contains R134a refrigerant. If it need refrigerant that means you have a leak. It is illegal to add refrigerant without first repairing the leak. Seek professional help with the repair first.

The first thing to check is that the outside unit is running. That the compressor and the Fan is running. If they are running, then have the Freon pressure in the system checked. You may be low on coolant.

Yes a heat pump reverses the function of an air conditioner. Like any refrigerant system if a Technician says "it needs Freon", make sure the leak is repaired first.

W.H. Carrier invented the air conditioner in 1902.

The first air conditioner for the home was available in 1928 when Willis Haviland Carrier developed the 'Weathermaker', an air conditioner for private home use.

You do not add freon. The refrigerant is R134a and if you buy a recharge kit at auto supply it comes with all needed instructions. The first thing to do is look at all of the connectors (usually about 4) on the lines leading from the a/c compressor to the firewall. If there is the least indication of oil at any connector you have an o ring leak. All O rings should be replaced before charging. This involves pulling system to vacuum and recharging after replacing O rings.

If you are having to add refrigerant, then this means you have a leak, and you will be adding refrigerant again in a few months. It is illegal to add refrigerant to a system with a leak without first repairing the leak. So, my advice is to take it to a professional and have the leak repaired and refrigerant added with the proper equipment, which you do not have.

Freon (R-12) is way too expensive as it is no longer in production. Have it converted to use R-134a. I suggest a visit to a professional A/C shop as the fact that you need to add refrigerant indicates you have a leak that needs repairing. It is illegal to add refrigerant to a system with a leak without first repairing the leak.

First off if it is low of refrigerant then it has a leak. It is illegal to add refrigerant to a A/C system without first repairing the leak. You have neither the tools nor the skill to repair the leak, and to add the correct amount of refrigerant. Take it to a professional shop with the proper equipment and knowledge to repair the system correctly.

Here is some info. on recharging your A/C... How to Recharge Your Car's Air Conditioner By Larry Carley c2007 LOW REFRIGERANT If your air conditioner is not cooling well because the system is low on refrigerant, recharging the system with refrigerant should restore normal operation. This can usually be done with a few cans of refrigerant and a simple service hose connection. RECHARGING PRECAUTIONS First, wear safety glasses to protect your eyes. Also avoid skin contact with refrigerant. The chilling effect of spilled refrigerant can cause instant frostbite on bare skin or eyes! WHAT TYPE OF REFRIGERANT? Next, you need to figure out what type of refrigerant your vehicle requires:On 1995 and newer passenger cars and light trucks, the correct refrigerant is R134a. DO NOT use any other type of refrigerant.On most 1994 and older passenger cars and light trucks, the original refrigerant was R12. R12 is no longer available to do-it-yourselfers and is very expensive. When older vehicles with R12 A/C systems need refrigerant, they can be refilled with recycled R12 from other older cars (this requires taking your car to a repair shop for professional service), or with some alternative refrigerant other than R12, or with R134a (which requires certain modifications). CAUTION: Mixing different types of refrigerants is NOT recommended. Use the same type of refrigerant that is already in the system unless you are converting an older R12 system to R134a or another refrigerant. WARNING: Flammable refrigerants are illegal. DO NOT use any type of flammable refrigerant (propane, butane or flammable hydrocarbons). Click here for more information about retrofitting older vehicles with R12 A/C systems to R134a. LOCATE THE SERVICE FITTINGS Next, you need to locate the service fittings on the A/C system. There are two: a LOW side fitting and a HIGH side fitting. The LOW side fitting is usually located on the suction hose or line that goes from the accumulator to the compressor. The HIGH side fitting is located on the line that goes from the compressor to the condenser. R12 Low Side 7/16 in. threaded ß----------à R134 Low Side 13mm Quick-disconnect R12 High Side 3/8 in. threaded ß----------à R134A High Side 16mm Quick-disconnect On older R12 systems, the LOW and HIGH pressure service fittings are screw-type Schrader valves. On newer R134a systems, the LOW and HIGH side service fittings are quick-connect style fittings. The LOW pressure fitting is SMALLER than the HIGH pressure fitting. RECHARGE PROCEDURE 1. Connect the recharge service hose and valve to a can of refrigerant.2. Turn the valve on the service hose to puncture the top of the can.3. SLOWLY turn the valve back out to release a small amount of refrigerant into the hose. This will blow air out of the hose (which you do not want in your A/C system).4. Close the valve so no more refrigerant escapes, then quickly connect the other end of the service hose to the LOW pressure service fitting on the A/C system.CAUTION: DO NOT connect a can of refrigerant to the HIGH side service fitting. The operating pressure inside the A/C system when it is running may exceed the burst strength of the can, causing the can to explode! This should be impossible to do because the service hose for recharging the A/C system will only fit the smaller LOW pressure service fitting. Even so, you should be aware of the danger.5. Hold the can UPRIGHT so no refrigerant liquid enters the service hose. You only want VAPOR to be pulled into the A/C system (the compressor may be damaged if it sucks in a big dose of liquid!).6. OPTIONAL BUT HIGHLY RECOMMENDED: You should use a gauge to monitor the recharging process. Though not absolutely necessary, a gauge will help you recharge your A/C system more accurately, and reduce the chance of undercharging or overcharging (either of which will reduce cooling performance).A high pressure A/C gauge can be connected to the HIGH pressure service fitting, or a low pressure A/C gauge to the LOW pressure service fitting, or gauges can be attached to both fittings (that is what professional technicians do).NOTE: Some DIY recharging kits include a low pressure gauge on the service hose or on a trigger-grip style can dispenser.7. Start the engine and turn the A/C on MAX/HIGH.8. NOTE: The compressor may not engage if the system is too low on refrigerant. The low pressure cutout switch will prevent the compressor from running if the system is too low on refrigerant (this is done to protect the compressor from damage due to a lack of proper lubrication). The compressor must be running to suck refrigerant through the service hose into the system. So if it is not engaging when you turn the A/C on, you may have to supply battery voltage directly to the compressor clutch using a fused jumper wire. Look for a single wire connector near the front of the compressor, unplug it and hook up a jumper wire to the battery POSITIVE terminal. This should cause the clutch to engage and the compressor to run.9. OPEN the valve on the service hose so refrigerant vapor will flow from the can into the A/C system. It may take up to 10 minutes or more per can to suck all of the refrigerant out of the can into the A/C system. Feel the air coming out of the ducts inside the vehicle. It should be getting colder.10. If you are using a high or low pressure gauge (or both) to monitor recharging, look at the gauge(s).LOW pressure gauge: When the reading is between 25 and 40 psi with the A/C running, STOP. The system is fully charged and should be cooling normally. DO NOT add any more refrigerant. If the gauge is over 50 psi, you have overcharged the system with too much refrigerant.High pressure gauge: When the reading gets up around 200 to 225 psi (R12), or225 to 250 psi (R134a), STOP. The system is fully charged and should be cooling normally. DO NOT add any more refrigerant.NOTE: The high and low pressure readings will vary depending on the system and ambient temperatures (higher temperatures cause higher system pressure readings).Refer to the vehicle manufacturer specifications for normal system operating pressures, and the total refrigerant capacity of the system. Most newer passenger car A/C systems do not hold much refrigerant (only 14 to 28 oz.), so you don't want to add too much if the system is low. One can of R134a typically holds 12 oz. of refrigerant.11. If the system needs more refrigerant after adding one can, you can add a second can. CLOSE the valve on the service hose, then disconnect the hose from the empty can, screw a new can onto the service hose valve, turn the valve to puncture the new can, then turn the valve all the way back out again so refrigerant can flow through the hose into the A/C system.When you have finished, turn the engine off. CLOSE the valve on the can of refrigerant before disconnecting the service hose from the LOW pressure fitting (in case there is any refrigerant left in the can). Don't vent any leftover refrigerant from the can. Leave the service hose attached to the can with the valve closed so you can save the refrigerant for a future recharge.Remember to replace the plastic caps over the service fittings, and remove the jumper wire from the compressor if you had to jump it to make it run. IF THE A/C SYSTEM STOPS BLOWING COLD AIR AFTER A FEW DAYS, WEEKS OR MONTHS If your A/C stops blowing cold air several days, weeks or months after you recharged it, it means the system has a leak and the refrigerant is escaping. You should add some leak detection dye to the system to find the leak. The leak should then be repaired before the system is recharged again; otherwise you are just wasting your time recharging the system over and over again.

In 1902 Willis H Carrier invented the modern air conditioner.

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