• Having air conditioning in Summerville, South Carolina and the surrounding cities is an absolute must when the heat rises. While it’s an excellent addition to your home especially with the unpredictable weather we encounter here, you may have to run AC 3/4 of the year in SC. There are occasions when it can get a bit frustrating. For example, when your AC stops working and breaks in any myriad of different ways.

    Sometimes it blows hot. Sometimes it freezes up. Sometimes it stops working. And sometimes it leaks water. Let’s take a look at that, shall we?


    There are a number of causes of leaking water but in most cases, this is something you need to address quickly. These causes include:

    Defective Condensate Pump

    If you have a condensate pump installed that is not pumping then this can cause water to build up. You can test this by pouring a small amount of water into the pumps tank by removing 1 of the round knockouts. If it’s broken, then it will fill up and not pump out. The majority of systems in the area have traditional PVC drain lines and can read below for other things to look for.

    Clogged Primary PVC Drain

    Of course it’s normal that there would be water/condensation inside your air handler when you consider that it’s circulating lots of cold air. Normally though, this will be removed by the units condensate drain line at the indoor unit which runs outside. If the drain becomes clogged due to rust and everything else that grows in standing water it will need to be cleared to restore proper operation. When the HVAC system does not drain properly in most cases you will see the secondary drain pan under the unit is full of water. Also many times if the unit was not installed properly the water can actually drain in to the duct system and cause water damage to the home or office.

    There should never be water in the secondary pan as this indicates a clog. With a wet dry vac you can remove the water from the secondary pan to prevent the metal pan from leaking/rusting. Also you will want to be sure to clear the primary drain that goes into the indoor unit or it will keep draining back in to the pan. To do this the easiest way is to take the wet dry vac outside to where the PVC drains come out of the house (usually near the outdoor unit) and pull the clog out by putting the hose over the 3/4" PVC drain and sealing any gaps to provide good suction. Compressed air or nitrogen can also be used to clear it but be sure there is not a vent in the drain, meaning the PVC has no openings all the way to the unit, if so cover the vent with tape while clearing.

    Supply Duct Insulation

    If the supply air duct attached the unit is not insulated well or is loose/hanging it can cause the duct to sweat and leak into the pan.. that is if you are lucky enough and not on to the ceiling. This can be solved with a little insulation, duct tape and duct sealer to prevent the tape from coming off after time.

    Dirty Evaporator Coil

    If your air conditioning system was operated for any length of time with the return air filter removed this can cause the dirt/debris that the filter would have usually caught to build up on the evaporator coil. The coil is designed to drain a certain way and when dirt or debris get in the way of the condensation it causes it to drain in areas where it should not. This is especially true in vertical unit installations like closets etc... The only option is to attempt to gain access to the coil or remove it completely to clean and reinstall which can be costly. In either case it is highly recommend to schedule an air conditioning repair company to clean it at this point and never run the system without a filter.