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Charging an empty freon system and clutch wont engage for recharge

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I saw a post elsewhere to hold the can upside down and put some liquid refrigerant in the system when way low. Unless you have a serious leak I'd think that you could add to the high end of normal pressure, let things sit a while and check / add again to get it to the point that the low pressure switch will turn off. YMMV.

Posted on Jul 31, 2010

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You cant just charge it. it needs to be evacuated with a vac pump. The clutch will not engage until it has enough pressure.

Posted on Jul 24, 2010


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1 Answer

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Compressor will not run if freon charge low. If you want it to run supply direct power and ground to back of compressor. I do not recommend a home recharge as you will not be able to evacuate the moisture in the system and inject adequate amounts of oil

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Hi, on the front of the compressor you will have a plate which is your clutch, you can find it by using the manual. Its a metal plate that's mounted right on the front face of the compressor pulley. With the engine off and you hook the hose and gauge to the low side, if you have freon in the auto at all it will show pressure, with motor off. When you start the auto and turn the a/c on, you will hear the plate/clutch click as it engages and the compressor will start pumping, pulling the freon into the port. If the clutch is not working, it will not pull freon into the a/c. Have a helper with you and you can have them turn it on and you watch and listen.If the auto is low, the clutch will go on and off, on and off while you add freon. You will know the sound it makes when you hear it. Make sure the can is pierced to let the gas out, but if the auto wont take it, more than likely the compressor clutch isn't working, so it will not pull freon from the can. It has to draw it out. Check for the a/c fuse under hood in a electrical box or under the dash. It will tell you in the manual where it is located. If the system was empty, you will have air in it and it will need to have a vac. pump put on it to remove the air and moisture. If you had any pressure at all, you will be OK. Try and check the things I have said with a helper and make sure the clutch engages, and it should pull it right in. It will hold about 2- 12 oz. cans when empty. Please let me know the out come on this, keep me posted. Also, be kind when rating as I know you will. I will be here if you need more help.
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