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Re: 2004 rav4 Air con compressor rins for 1 second then...
With the new pressure switch, you may have found a new problem, it sounds like your compressor may be going off on high head pressure, or something similar like a clogged line. That is about the best thing I can think of unless the compressor itself is having internal problems. If its cooling, then it may be a temp sensor on your coil, or line if you have one.
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Low freon will cause the compressor to short cycle, when the compressor runs the pressure in the low line is pulled down and the low pressure switch turns it off. Not running the pressure builds up and turns it back on. In the old days there was no low pressure switch, with no freon to carry the oil the compressor was destroyed.
Hello, You need to check how much Low end pressure you have. The Low pressure cutoff switch will disconnect the compressor if the pressure is too low. The high end pressure switch will do the same thing for extreme pressure.
Sometimes the Low pressure switch will get weak and cut off the system too early. Just change this switch which will come out with only a slight puff of Freon being lost. You can jump the connector with a U shaped wire and bypass the Low pressure cutoff switch. If the compressor works better and does not cut out, it can still be low on Freon or have a bad Low pressure switch.
However, if the compressor cuts out a Second time with the Low pressure switch bypassed, the system is probably overcharged and the HIGH pressure switch is cutting off the compressor. You need to purge some Freon out of the system if High pressure is indicated.
Where it gets tricky is the Compressor will compress both Freon and Atmospheric air. Your efficency drops when the Freon is displaced by Atmospheric air. You will need to find the leak in the system which is allowing Freon to leak and outside air to enter the system. You will get a pressure reading with any gas in the lines.
There are Leak detectors and sealers for the system. I hope you just have a bad low pressure switch which is the easiest solution.
usually you have to have these ac systems vacumed while refilling, also you could have a bad compressor, even if it is new, friend of mine has this same car, bought new comp from autozone, basically same problem you are having, check with auto parts to see exactally how much comp oil is needed and freon, you may have to much freon in it.
I'm not absolutely sure on this one, but many compressors have a low pressure and a high pressure cut off switch. The low pressure switch monitors to make sure there is enough refrigerant in the system. Too low and it cuts off because otherwise your system will ice up (go figure that one out!) The high pressure switch is there to protect from clogs in the system causing damage to the compressor or other system components.
You should have a qualified professional check the system and both of those sensors. You most likely have a clog in the system which can be caused by a broken desiccant bag or a compressor that is beginning to self destruct and some piece of metal is clogging the system in a hose or at the orifice tube.