How do I disconnect the AC unit from furnace? I don't need it anymore. I have a Lennox G14 series. #G1 1404 80 18.

Thank you, Dianne

Dianne, Just leave it in place, if not using it, it does no harm. Legally you cannot just disconnect the linesets and pull the A coil because you will be venting the Freon into the air, an EPA violation. If the AC working properly, you may be able to sell the condenser and evaporator to a company who would remove it legally and recover the Freon.