A/C ONLY BLOWS HOT AIR THE COMPRESSOR WILL NOT KICK ON AND IT HAS FREON . WE ALSO PUT A JUMPER TO THE LOW AND HIGH SIDE CANNOT GET POWER TO THE COMPRESSOR IS THER A RELAY SWICTH OR WHAT OR IS THE CHUCTH CONECTOR BAD? PLEASE HELP
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Does the compressor kick in when you turn it on?(if not it could be the a/c switch or the power to it, the a/c clutch wire connection, the clutch itself, or it's low on freon) You should hear the clutch kick in when you turn the a/c on. Low freon will also cause the clutch to not kick in. Remove the low-pressure switch plug and jump it with a piece of electrical wire. If the clutch kicks in, you just need to add some freon. Put the plug back where it was after you remove the jumper wire.
Is the belt on and adjusted to the right tension? If the belt is loose it won't cool as good as it should.
Check the freon in the system with a gage. If it's low, add some to the right amount and see if it cools. If it is overcharged, it will blow hot air, too.
The heater control valve slider should be all the way to the left so hot water isn't allowed to circulate through the heater core which would also make it blow hot air out the a/c ducts.
Good luck, they can be a pain, but with careful, step by step troubleshooting it can be fixed. There is plenty of information about a/c online to help you out. Try googling in: auto ac troubleshooting tips for more info. garcuda
A mechanic would check the system with a set of pressure gauges. If the compressor is running, the low side would read around 30psi and the high side would be around 250psi. That is how you know if the system is full of freon or not. You may have to get a professional diagnosis to proceed. If you replace the compressor, the accumulator needs to be replaced and a vac pump is used to pull all of the air out before the freon is added.
How do you know the freon charge is not low ? If the system is full, you should be able to jumper the relay and make the compressor clutch engage. If not, the problem could be the low pressure switch or the clutch.
It may still be low on freon. It can hold several cans. High side should be around 250psi and low around 35 or 45psi at idle if system is charged. If you raise engine speed the low can drop below 20psi and switch off the compressor if the system is low on freon. Could be a restriction in the system, bad relay, or bad a/c compressor-clutch.
several things can make the a/c blow hot air. if the a/c was working but barely blowing then you may want to check for a clogged cabin air filter(it is behind the glove box in the a/c box). since the a/c is blowing hot all the time now, try releasing the freon out of the system or have it recovered into a recovery machine. you may have OVERCHARGED the system and the high pressure switch is keeping the compressor from working.the best thing to do is have the system pressures checked to see if the low side is 35-45 psi and the high side is175-225 psi with the compressor working. if the pressures are not within these parameters then there is another problem.
Your going to have to check that the compressor is turning the clutch (center of the pulley) get a set of A/C gauges and check for any freon in the system (static test) high pressure side should read above 200 psi, remove the low pressure cut out switch electrical connector and place a jumper wire between the two wires, this should activate the compressor, the gauges will now tell you how much freon is in the system, the high side needs to read 150 PSI to activate the cooling fans, place a temp gauge in the cener inside vent, place the fan on low, temp coming out of the vent should read around 45-50 at idle, now if you have to add freon that means you have a leak, put dye in the system, and check for leaks.
Not sure how you know if the freon is full without the unit running. There are a number of switches which can keep your A/C from coming on. There is a low pressure switch which is usually located on the larger line and sometimes located on a silver cannister (called an accumulator) which is the low side of a compressor circuit. There is also a high pressure cutout which is usually located on the back of the compressor unit. Both of these switches can be jumpered out to see if they are the reason for the compressor not working. You remove the two wire connector to either switch and place a small jumper wire between the two wires on the connector block. The other reason my be a low idle cutout switch and this will also usually be located near on on the compressor. You can also test it the same way as the other switches. If it is the low pressure switch then of course you will need to add freon which you can purchase from any auto parts store. They usually come with instructions and all the equipment needed to add in freon. If it is high pressure, then some of the freon should be recovered from the system by a technician. If is the low idle cutout then you will have to take it to a mechanic to understand why it is idling so low. Hope this helps.
You may have created an over charged condition and at this point the a/c compressor will cut off on high head pressures. This can be verified by installing gauges to the systems high and low side service taps and reading the pressures.An overcharged system will start the compressor briefly but soon cuts off once pressure goes to 350 - 400 lbs on the high side. Acceptable pressures for this system should be no greater than 250 high and low suction should drop to 40-50 psi.You might recover the charge and evacuate the system,then try bringing the charge back to proper level.A sight glass in the reciever drier really helps determining proper fill.Once all bubbles have dissipated from the sight glass during charging ,one should stop at that point to avoid overfilling.Too much freon is worse than a low charge especially in hot ambient conditions....