My 2000xk8 Jag air conditon is blowing hot air . I had it

Yes I am find to drive

Could be gas has leaked out causing low pressure and no cold air!

The first thing to do would be go to your local auto parts store and buy an air conditioning recharge kit. Provided your vehicle isn't too old, they sell recharge kits that require no tools.

If their is a leak anywhere while you recharge, you will know.

Try recharging the air conditioning first, it is very simple and the kits come with simple instructions.

If there are no leaks, your A\C will blow cold air again. As for the pressure, if it continues to slightly blow air you may be looking at a new air compressor unit or a vaccum line. A new unit will run you anywhere from $200-$2000 dollars plus labor depending on the vehicle.

If the recharge works, at least you will have slightly blowing cold air rather than hot and you can continue that way until the unit fails.

HI you have a expansion valve at the rear evaperator that has gone bad and has to be replaced and a/c will need to be recharge.Hope this helps,if it does please rate my post.Thank You for using fixya,iluv2fish...Ray..

your air con needs re gasing

you can try recharging the system...it's a fairly simple process and freon can be purchased at any parts store. here is an overview:
http://www.aa1car.com/library/ac_recharging.htm

After the A/C turns hot , check to see if compressor is still cycling. If not the system may need recharging.

More likely the recharge blew a o-ring and you have a leak. When your Cavalier was blowing hot air and a recharge fixed it that means it was low on freon which lets o-rings dry out, go back to the shop and have them leak test it. They use a pressurized dye to find the problem. If it's blowing it's not the cooling fan relay, they may have meant compressor relay but I'd have a leak test done first it's not expensive and easier that chasing unknown possibilities.

Check for a vacuum leak. WHERE is the magic question.

my heater only blows cold air please could you give me some advice on this thanks . everything else is ok temp ,engine etc