Evacuated system but ac will not run when recharging.

To replace the expansion valve you need to evacuate the refrigerant first. Then you can replace the valve. After that you have to evacuate the system again to remove the air. Then add replacement oil and recharge. You'll need an evacuation/recovery machine, a vacuum pump and a refrigerant scale to do this job yourself.

Evacuate the system and replace the valve core. Then pull a vacuum and recharge with refrigerant and whatever oil was lost.

if low charge buy freon charge can with hose and hook up to low side start vehicle let run with a/c on may take more than one can if replacement of a part have to evacuate system (run a vacuum pump ) to get rid of moisture first than can charge system the link shows the service ports on a 04 but same as the 03
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dealership has to evacuate system. best let dealership fix you need equipment to recharge AC system.like vacuum pump and manifold gauge set.

This still sounds like low pressure. If you re-charged a system that was low, and didn't pull a vacuum and evacuate the system first, then you still have air in the system, which is causing the compressor to cycle on and off.

Well, If you want to do the job correctly, you need to properly recover the freon and then evacuate the system before recharging. Failure to do so is ILLEGAL for the recovery part. EPA laws forbid knowingly releasing freon into the atmosphere. There are some hefty fines to pay if the authorities were to find out. Not to mention that I really don't appreciate people who knowingly and willingly pollute the air that I breath. - take that as you will.

For the evacuation part, failure to properly evacuate your system before recharging will leave moisture in the system that can destroy your new compressor. If that happens, you won't be saving any money!The air that is left in the system will take up room in the system that is needed for a proper freon charge and can adversely affect how well your system cools when you are finished.

Here is a possible alternative. Take it to a shop just for recovery and evacuation. The labor charges will not be that much. In fact, some shops will do the recovery for free if you tell them they can just keep any freon that is recovered. You need to do a recovery to remove the freon from the system anyway so nothing blows up in your face when you disconnect system components. Then you can return to the shop after replacing the compressor and drier fo an evacuation. This is a good idea also because the system can be checked for leaks by evacuating and seing if the system holds vacuum. That way you won't be wasting any freon dumping it into a leaking system.
Then you can recharge the system yourself using one of the kits available at your local parts store.

The only tool would be to evacuate and recharge the ac system, the system is under high pressure and if not evacuated it will spray out and you will also loose alot of the oil and may cause injury, beside that there are no other specail tools needed to remove it,

The real answer to your question is yes, the kit may work. Here is why you shouldn't use a recharge kit: Theoretically, your vehicle's refrigerant (R134a) should last forever. Your AC system is a sealed unit and the refrigerant never gets used up. The only way you can lose refrigerant is by it leaking out of the system. However, if your refrigerant can leak out then air and contaminates can get in. This is bad. A recharge kit simply injects refrigerant into the system. It doesn't evacuate the system of any air and contaminates.This is critical. Your AC system should be hooked up to an AC machine in order to evacuate out all of the air and contaminates in the system. The machine will then hold a vacuum on the system to verify its integrity.Finally, the machine is able to inject new compressor oil that also contains a dye that will enable the leak to be located. If you use that recharge kit, you stand the chance of over pressurizing the AC system and causing premature compressor failure. This can be very expensive. Paying a reputable shop to evacuate and recharge your AC system is much less expensive. If your AC system hasn't operated in over 6 months, it's especially critical that you have the repair to your AC system performed correctly. Your AC system's seals may have dried out and the new compressor oil will be critical in helping to recondition those seals or the seals may need to be replaced. Good luck and hope this helps. keep me posted if you need help to recharge the system.

this should be done by a certified A/C technician with the right tools, the system must be evacuated and then recharged with the correct amount of freon,doing anything less will cause problems. please rate my fix as i strive to be the best,nned more help get back to me

reclarification. I will need to know what type of vehicle it is. Secondly, do you have the equipment to evacuate and then recharge the a/c system?

The system must be pumped down to 20 inches of vacumn for at least 1 hour before recharging the system.

This operation is highly regulated in most states now because of EPA issues.
Bill