My ac blows warm air

Your AC system is a closed system, so the fact you have to put more Freon in, means there is definitely a leak. I would check it out with a mechanic.

My guess is that one of the hose's has a leak and needs to be replaced. A mechanic can run some tests to check if that's the case. Best of luck.

might need to be recharged and might have a leak in the system. take it and get it checked

I would replace the AC compressor cycling switch it may be sticking have seen it a number of times. The switch is located in the receiver dryer on the passenger side of the engine compartment. See picture below.

If this isn't the problem the AC compressor relay may also cause this, flip a coin.

check to see if ac clutch is turning off and on

It sounds like your AC unit could be overheating or even damaged.

AC units have a sensor that will turn them off automatically to prevent damage from overheating. If there is an insufficient amount of air flow, the unit will heat up, and then eventually turn off.

When the car is moving, more air is forced over the unit, likely keeping it cool enough to run, however, when the car come to a stop, it loses that air flow, and quickly heats up. Thus, the AC would work while the vehicle is in motion, and overheat and stop when the car is stopped and idling.

However, the AC unit could be completely blown. The cold air while moving could be just a case of air being forced into the car. Think of a house fan, the fast the wind blows on you, the cooler it gets.... Thus, it could be an illusion that the AC is working when car is in motion, when it really isn't.

Hope this helps.

you can run the compressor for a few minutes to see if you get cold air with the low pressure switch crossed out. if you don't have cold air after about 5 minutes then you still have a leak somewhere.

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

you still got a leak,could be the ac hose,recharge again but this time w/dye so u can see if theres a leak,good luck keep posted..

the second fan shuold work on and of not all the time and you probably need some more ac frion in your system.