Ask any HVAC contractor who knows what they’re doing, and they’ll tell you the piece of advice they give out the most often to homeowners who want to improve their heating or lower their heating bills is Change. The. Filter. Regularly. And we will gladly beat that drum as well, because leaving the filter in place until it becomes thickly clogged creates plenty of problems.
The filter on your furnace stops debris flowing through the return air vents from getting inside the furnace. If you haven’t changed the filter this winter, now in late winter is when you’ll start paying for it—literally! Here’s how keeping a clogged filter around at the close of winter can cause furnace problems.