How to fix air conditioner causing a lot of Water pools

There are several questions that need to be answered about what type of system you have, but i found this posting that may help:
As your gas furnace runs, is there water leaking at the base? Is the furnace's air filter wet, too?There are a few things that could be happening here. But if you have a high-efficiency furnace, here's the most common cause: a condensation leak.
We'll explain why a furnace creates condensation, and what's causing it to leak out of your furnace.
Note: You'll know if you have a high-efficiency furnace if:

• The yellow energy guide tag says your furnace's efficiency is 90% or higher AFUE.
• The vent/flue pipe is white PVC as opposed to metal.

Why a high-efficiency furnace creates condensation
How in the heck does a high efficiency furnace create condensation/water anyway?
It's all about how the furnace extracts heat from combustion gases.
A lower-efficiency furnace extracts some heat from combustion gases and then quickly vents them out the flue pipe.
But a high-efficiency furnace, to extract more heat, has 2 heat exchangers. These allow the furnace to extract heat from the gases for a longer period of time. This causes the combustion gases to cool and then condense.
That condensation then exits out your home through a drain. But if that water is pooling around the furnace, there's a problem preventing it from draining properly.
Causes of a condensation leak around a high-efficiency furnace

• Clogged condensation tubing
• Clogged condensation drain
• Breaks in the condensation line
• Issues with the condensate pump (if you have one)

You'll need a furnace technician to diagnose which of these is the issue and then fix it.
Other causes of leaking water around a furnace
If you have a conventional, standard-efficiency furnace...then its flue pipe may be incorrectly sized.
If you have a whole-house humidifier connected to the furnace...there may be an issue which is causing the humidifier to leak into your furnace. Your humidifier should be getting annual maintenance from a professional to prevent this.

CHECK FLUE FOR OBSTUCTIONS AS WELL AS COMBUSTION AIR INTAKE FIRST. THEN CHECK TO SEE IF THE FURNACE DRAIN IS OPEN AND NOT CLOGGED [ONLY IF YOUR FURNACE IS A CONDENSATING HIGH EFFICIENCY MODEL, typically the flue pipe will be 2 or 3 inch pvc pipe] over the years more often than not, it is an obstruction or poor drainage which will not prove the pressure switch to allow the burner to ignite. in rare cases the furnace control board could be bad as well.TRY DISCONNECTING FLUE AND COMB. AIR AT FURNACE JUST TO SEE IF FURNACE WILL IGNITE. HOPE THIS HELPS!!!!!!

Check condensate tubes - they may be blocked and need cleaning. All manufactures recommend having your furnace and air conditioner checked and cleaned on an anual basis. You can clean your condensate tubes yourself - if it is severly blocked you may have to use compressed air to unblock, but first to a combination of bleach and water. Better yet a technician will clean the condensate tubes and well as the rest of the unit so that it's running at its top efficiency

You probably have a 90+% efficient furnace. They produce condensation. Does it have PVC vent pipes? If so there is a drain tube for condensation.

Air conditioners and high-efficiency combustion furnaces create significant condensation, which exits through a plastic drain tube. This should go into a floor drain or be carried away by a small "condensate pump." If water is pooling at the base of the appliance, something may be blocking the water's flow or leaking, or the pump may not be working. 1) Look to see if one of the tubes is leaking. If it is, replace it. 2) Test the condensate pump by pouring water into its pan. If the pump doesn't start, either it isn't receiving power, or it is broken. Be sure that it's plugged in and test the circuit. If it's broken, either get it repaired or replace it. 3) If the pump runs but doesn't empty the pan, the ball-like check valve just before the discharge tube is probably stuck. Unscrew the check valve and loosen the ball inside it. Look for an obstruction. If it appears that a condensation drain tube is clogged with algae, remove it if possible (you may have to cut it and replace it later with a coupling). Run a wire through it to clear it. To kill algae, pour a dilute solution of bleach (1 part bleach to 16 parts water) through the pipe. 4) With an air conditioner, ice may be blocking the tube. If this is the case, be sure the filter isn't dirty. If the filter appears to be fine, the air conditioner's refrigerant supply is probably low. This is when it's time to call an air conditioning technician.