Re: 97 Sable - Air Conditioner - No cool air
You will need more than one can to get enough pressure to stay kicked in. When it kick's in it's supposed to drop on pressure on low side as when its off both the high side and the low side pressure will equalize. In your case there is not enough freon to maintain a low pressure without dropping too low and kicking out on the low pressure switch. If it was working fine then all of a sudden nothing, and no reading on the gauge then you have a leak. Dont waste your money on freon till its fixed. Look for fresh oil on the lines and your leak will be near.
Myself I like to have a low pressure reading of 32psi. Too little or too much will cause it not to cool too well. Not for sure on the taurus, im guessing 3 1/2 to 4 cans. Keep adding till you reach a constant 32 to 35 or so psi with the valve closed on the can.
Sorry if I ramble on in this post, its been 105 degrees here and I have been out in it all day, I'm beat...