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you have moisture in the system this causes your expancion valve to freeze up an stop working, thats why it works for sort time and when it de-freezes stars working again. you need to do a EVAC & RECHARGE with a good AC service equipment, specially attention to pull vacumm por at least 20minutes so you get all moisture out of the system.
Good luck
First of all if your system was low on refrigerant there is a leak.You can recharge and exspect the air to work,how long it will last depends on the size of the leak.Somtimes the refrigerant can have a leak prevenative but this is for very small leaks.You need to have dye put in to system and use black light to find leak.they make kits at your local auto parts store that you can buy and do this your self.If you say it worked well for about 20 days, that is a fairly large leak.The reason why the compressor is acting so erractic is because the freon has oil in it and lubracates the bearings in compressor.When the system goes low the compressor will turn on and off to protect itself.Eventually it will stop running completly.Idont think you have an electrical problem,Ithink you have a big leak.Try what I said and good luck....Brian
There have been a lot of problems with the compressor cutting out when it gets hot. When the A/C begins to blow warm, check the power supply wire to the compressor. If there is power in the wire, you will most likely have to replace the compressor. If there is no power, you will have to trace it back to see what the problem is (a wiring diagram will help greatly).
Have your a/c tech look at the pressures at an idle. It sounds like the condensing coil does'nt have enough airflow or the compressor is week. Another possible problem could be that the temp control door is'nt operating properly. Hope this helps. Good luck.
I had the same problem (during Summer!!) - If you take the Fan/A.C/Temp Control panel off, you'll probably find the plastic bracket that the control cable mounts to, is broken. I just used 3 zip-ties to hold everything in place. 30 minutes work, & 50c parts!! No problems since.
There is a pressure sensor welded into the pipe work for the aircon with two wires coming out of it.
Unplug this and bridge the wires together when the car is running with the air con on.
If it is a faulty pressure switch you will hear the clutch on the compressor cut in and out when you touch the wires together..If this works buy a new switch..but you will have to have the car regassed.
Cheers
HI, giving the compressor 12v directly is not the way to go as you are bypassing the entire fail safe cercuit. it seem to me that your ac gas is low(can be checked via ac pressure gauges) wich means you have a system leak sumwhere. as soon as your hi/low pressure switch(depending on system) detect inferior pressure to the spesified pressure ,the ac compressor voltage is cut in order to protect the pump from seizure.
Or perhaps your evaporator(small radiator like unit behind dash) can get freezed up caused by either too mutch system gas(check pressure) or poor opperation of the expantion valve. the evaporator then has a sensor(themometer) wich measures evap. temp and if the value drops below spec (usially round about7degrees) the ac compressor will be cut once again(fail safe)
Maybe your ac compressor overheats due to inferior system oil/oil capasity, also note that only some systems incorperate the function of measuring ac pump temp. then again temp to high= fail safe=no12v to ac pump.
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