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There are two methods to clean out your air conditioning drain line. Cleaning your drain line regularly can help your equipment run more efficiently. If the clog is severe, start with Method 2.

Method 1 – For Small Blockage in AC drain

1. Turn HVAC system off.

2. Locate cleaning port. If the unit has turned off due to a blockage, you may need a bucket to collect the condensation resting in the drain pan.

3. Remove cleaning port cap.

4. Assess clog. If you can see the blockage, attempt to remove the blockage. Do not push if further away. Instead attempt to lift the blockage out of the drain pipe. If the blockage breaks, separates, and falls down the pipe do not be alarmed. It can be rinsed out with water.

5. Slowly pour cleaning solution down PVC drain line. If cleaning solution fills drain line, do not continue to pour solution. Follow steps in Method 2.

6. After pouring is complete assess the blockage. If the cleaning solution does not flow out of the drain line the blockage is still intact. This may be a sign that there is a larger block in the drain line. Follow steps in Method 2. If the pipe fills and slowly drains then repeat step 5 until cleaning solution passes without difficulty.

7. Replace cleaning port cap.

8. Turn system back on.

Method 2 – For Larger Clogs in the AC Drain Line

1. For larger blockages, use a wet-vac or air compressor to remove the blockage. If using a wet-vac, suction can be applied to either end of the drain line to remove the clog. If using an air compressor, see step 3.

2. If the cleaning solution or water fills up the drain a wet-vac can be used to remove the fluid. Repeat pouring of cleaning solution down PVC drain line, if necessary.

3. Thrusts of air from the air compressor should be applied from the cleaning port location at the air handler unit. *CAUTION: if air is thrust incorrectly damage may occur.* Make sure to thrust air down the center of the pipe not towards one side or the other.

4. Once the line has been cleared, test with cleaning solution or water.

5. Replace cleaning port cap.

6. Turn system back on.

Routine Cleaning Without Blockage

1. Turn HVAC system off.

2. Locate cleaning port. If the unit has turned off due to a blockage you may need a bucket to collect the condensation resting in the drain pan.

3. Remove cleaning port cap.

4. Slowly pour cleaning solution down PVC drain line. Repeat three times.

5. Replace cleaning port cap.

6. Turn system back on.

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