Remove the cap from the condensate line.
Attic overflow pan.
The outlet for the drain should be on the lower side of the pan so that water flows toward it.
Use a wet dry vac to remove the standing water from the drain pan.
If the build up of condensation exceeds the line s ability to remove the water you re probably going to get some.
Carefully pour a cup of bleach into the drain line.
Without these the pan might sag creating room for water to.
If you re still scratching your head trying to figure out what s causing the ac unit drip pan to overflow keep reading for some of the most common causes.
This comes with attached pvc fitting for added durability.
If not visible use the wet dry vac to clear the blockage from the pipe.
This is in place as an added layer of protection against water damage.
It s usually better to replace the entire drain pan rather than trying to fix it.
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The attic air conditioner drip pan installation recommended condensate discharge locations it applies to any central ac system installation as well ac condensate might drain indirectly into the waste pipe an example would be the tub overflow the sink tailpiece laundry drain.
If the pan itself becomes tilted or misaligned it will fill up more rapidly and possibly overflow.
Allowing water to overflow in the drip pan may contribute to mold mildew and even rot.
Because entire central air system is lying on its side in the event of condensate drain pan failure water does not drip in one general location.
26 gauge appliance drain pan is constructed of galvanized steel for long lasting usage.
If there is condensate in the overflow pan you probably have drain line clog.
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Inspect for visible blockage.
If visible clear the blockage with a thin wire.
If the outlet is on the opposite side of the pan water will pool before draining.
For furnaces in the attic there is a second condensate drain pan.
The drain line can get rid of excessive condensate but the water still flows at a certain rate.
The drain pan also requires stable supports underneath it to keep the pan in place and support the bottom.
Pour a gallon of water slowly into the overflow pan under the air handler and observe the water level in the pan to verify that water drains freely into the secondary drain line.