I have a 07 Caravan. The AC does not work. Will not take a charge
My Caravan AC will not Charge. I connect the hose but I can not get the refrigerant to go in. The hose is seated good but just will not charge. I tried bleeding it, I got hot dry air with very little odor out of it. Compressor will not run. tried again got very little to go in. bleed again small amount of refrigerant then same hot dry air.
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If your car ac is not taking in refrigerant, it could be caused by several things.
If you have recently done work on the system and you are going to fill the system the first time, you will need to pull a very deep vacuum before trying to charge in refrigerant. If you have already properly evacuated the system and having problems getting the correct charge adjusted, you may be having problem with pressure equilizing between the refrigerant source and your ac system. To get the refrigerant going again, you need to connect the charging hose on the low pressure side of the ac system and turn the fan and ac on cool. The pressure in the ac system on the low pressure side will get lower than the pressure in the refrigerant container and flow will start. When charging initially, charge liquid on the high pressure side and with the ac system running, charge gas on the low pressure side. To charge liquid, invert most container so spout is down, to charge gas, keep container right side up. Charging by gas help you to not over charge your system. Beware on most vehicle ac systems the suction and discharge connections are two different sizes and require the proper adapter. If you still having problems creating a pressure difference to move refrigerant, you can try immersing the refrigerant container in warm water or applying warm air to the exterior of the container.
Hope this helps.
They did a good job hiding it, but here's where to find it. It is in the engine compartment, on the driver's side (but towards the center), and is along the firewall between the engine and passenger compartments. The two silver-metallic refrigerant lines run horizontal from the passenger side (then turn and penetrate into the passenger compartment. The port is on the low side facing towards the front of the vehicle. You might need to move a hose out of your view, especially if you have the 4L engine (since the "big plastic cover" narrows your field of view. I hope that helps.
Go to a department store and get the recharge system (can and hose) of 134a refrigerant. You will connect it to the port under the hood. The port is on one of the lines coming from your AC compressor. The kit's connection port will only hook to the correct input port because of the size. The can will also have a diagram on it.
The 1998 Dodge Caravan ac should be charged at the low pressure service port. This port is located on the suction line near the compressor. The suction line can be identified by it's size, it being the larger of the two line connected to the compressor. You must purchase a recharge kit at your local part store, which should include charging hose with pressure gauge and a can of R134a freon. Gloves and eye protection should be worn during servicing.(freon can freeze your eyes and cause frost bite to your hands). Connect freon to charging hose, connect charging hose to low pressure service port, open valves and start engine, turn on ac. If compressor won't start it may be required to disconnect the low pressure switch and jump out the connector.
There is no such thing as an ac coolant, maybe the ac refrigerant you are refering to. The ac is not getting cold? You can buy a can of 134 that has its own charging hose and gauge. Find the low side line of the ac. Start the car first turn on your ac then connect the hose and charge it. It is very simple, now the gauge will show you how much you have in there already, and don't overcharge it.
you have a sticker under hood tells you how much your system holds, you should go get the amount in cans and you get a low side connection hose with charge can. you follow instruction on can and do not charge with out engine on and ac switch to on.
Your car uses R-134A, readily available at most auto parts stores. Best bet is to get a refill kit that includes the refill hose (get one with a pressure gauge attached if possible to ensure you don't overfill the system). Recharging is pretty straight forward. Turn the car on with the AC on HIGH, locate the low side AC line (will have a screw on cap). Attach the refrigerant to the hose but don't puncture the can until the other end of the hose is attached to the low side valve. Once both ends are attached, turn the screw on the hose to puncture the can of refrigerant; the car should suction the refrigerant out of the can. Disconnect the hose when the can's empty and check the vents on the AC. If its cold and frost develops on the AC lines under the hood, you're good to go. Best of luck and post back with any questions.
but a charging hose follow the large ac line/hose untill u come to a smallservice port this is where u hook up it will be a quick coupler conector,,,it just snaps on hold coupler back push on service port and release coupler,,,start car and turn on ac high blower max air,and recurculat if it has this ,it will cycle on and off untill there is enough freon dont over charge