If you are experiencing some problems with your air conditioning ductwork, then you may find that you need to perform a few checks in order to work out what the problem is. Condensation on the ductwork usually means that the area around the air conditioning ductwork is too hot, and when it comes into contact with the cold air inside the ducts, moisture forms upon it. You need to examine why this difference in temperature is occurring, and then check what parts are responsible and need replacing. This is not a difficult task, although it may be time consuming if you don't find the problem immediately.
Step 1 - Check the Temperature
The first thing that you need to do is to compare the temperature inside and outside of your duct. You can check the external temperature using a thermometer, simply by holding it in the air. You may find it harder to check the ducts, and if this is the case, then an alternative is to place the thermometer against the duct, as this should be as cold as the duct itself. When you have done this, you should be ready to work out the problem.
Step 2 - Replacing Fans
You may decide that you need to replace the fans on your AC unit. If the fans are not cooling the air around the room, then the ductwork will be considerably cooler than the air beyond it, which is one reason why condensation will form. Look for the right solution to the problem by checking your fans, and noting how they work. If you find that they are sluggish, or not functioning properly, then you have the option to replace them with newer versions, or you can also attempt to change the spead of the fan by looking at the wiring.
Step 3 - Adding More Antifreeze
Another problem which could cause condensation is the lack of antifreeze in your AC units. This will affect the heat contrast between the ducts and the outside atmosphere. Check the levels of antifreeze in your units, and then replace if necessary with additional liquid. You should also question where the old antifreeze has gone, and whether it is leaking from one of the pipes. This could be a more significant problem which has serious consequences.
Step 4 - Add More Insulation
If you have inspected the AC ducts and unit, and can find no significant problem, then the simple answer may be that your ducts just need greater insulation. This will prevent moisture from settling onto the pipes. You may need to add some anti-mold features, in order to prevent fungus from growing around the insulation, but once you have the material wrapped around the ducts, and tape added, you should see a decline in the amount of moisture gathered on the AC ducts.