A common misconception among homeowners is that the furnace drain pan needs to be emptied and replaced every year. This is an unfortunate misconception, and homeowners will pay a significant price for it. In fact, you will pay this price if you choose to keep the drain pan closed most of the time. It is much easier to maintain a furnace in operation with the drain pan open all the time. As a result, the drain pan fills with water, and an inspection of the plumbing system may reveal that the drain pan is clogged. In some cases, this clogging can lead to a major problem for your home’s heating system.
You can try filling the drain pan with gravel or other materials until the clog is removed. If this does not solve the problem, it will be necessary to remove the furnace drain pan. In most cases, you can do this with a compressor. If you do not have one of these, contact your local appliance shop. If they do not provide a suitable compressor, you can call a professional. If the drain pan is not clogged, a professional plumber should be able to unclog it.
On the other hand, it is also possible that the drain pan is clogged by some other debris. To identify the source of the problem, the plumber will need to remove the furnace drain pan. In most cases, clogs are caused by old clothes or old furniture left in the attic. Another common source of clogging is dirt or oil from tools in the basement. Most of these problems can be fixed by cleaning, disinfecting and repainting the area in question.