If the clog is severe start with method 2.
Blow out ac drain line.
For this to work well you need to make a tight connection between the hose and the line.
Place a piece of tape over the switch so it isn t turned on while you are working.
Over time your air conditioner hvac drain pipe gets clogged up and starts dripping because of the mold mildew and algae buil.
Turn hvac system off.
To clear these clogs you will need to suck them out with a wet dry vac.
Kill the power for the air conditioner where you will be blowing air through the drain line.
Then attach the suction hose of a wet vac to the line and try to suck the clog out.
Clean out your drain line with bleach in early springtime each year to kill mold and mildew and prevent future clogs.
Move the switch to the off setting.
Regularly cleaning your drain line can help your equipment run more efficiently.
Alternatively you can use an air compressor to blast air into the air handler s end of the drain tube in the hopes of blowing the clog out the other end.
If you can separate the cleanout from the ac or block the path of water back to the ac drain pan you can insert the cut off garden hose into the drain line as shown in this video and just gush.
You ll know your ac drain line is clogged if you see water pooling in the pan underneath the unit inside your home.
If the unit has turned off due to a blockage you may need a bucket to collect the condensation resting in the drain pan.
Once the drain line is clear use a funnel to slowly pour a gallon of white vinegar through the tube.
If that doesn t solve the problem locate the drain line access point near your indoor air handler.
How to unclog ac drain line.
You can find the cut off switch for the ac unit in the main circuit breaker.
There are two methods to clean out your air conditioning drain line.