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if the cooling fans are running with the a/c on then I suggest you check the a/c compressor relay. Toyota had a problem with these relays heating up and turning off power to the compressor. the relay is located in the underhood fuse box.
the ac clutch relay is the problem. It is located in the under hood fuse box. It is a $10 part. The relay will make a clicking sound when activated but the contacts inside are burnt causing no electrical flow to the ac compressor. Simply unplug and replace. The relay is labeled M/G CLT .
replace or blow out the cabin air filter as well. It is located behind the glove box. Instructions are in your owners manual.
If it blew cold air after freon added and 5 days later blew warm, you may have a leak in the system. Also check and see if compressor comes on if not you may have an electrical issue, relay for compressor,coil on compressor, etc.......
it is located in the engine compartment fuse / junction box it is on the drivers side then cover to the box will show you witch one it is ( the relay will be white in color)
First, you have to check if there is enough gas in the system in order to make the compressor run. A depleted charge will keep the compressor from running. Feel free to email me for location of fuses and relays.
Can you hear you A/C compressor kick off and on when you press the A/C button slowly off and on (off 3 sec, on 3 sec, repeat)? If your R134a i charge is low, system pressures can drop and the system will stop functioning to protect itself. It may need to be properly charged. The dealer or a service center will want to check the car, then charge it and add dye to diagnose it. This is normal. They usually request that you drive the car, use the A/C and come back in to check and see if the dye leaked out anywhere. You can verify that your car has r134a on the factory sticker under the hood or near the radiator. DuPont has a small can of SUVA or 134a at most parts stores with oil and dye. You could put it in yourself if you feel comfortable doing so and you follow the directions. Good luck.
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