Why Is My Furnace Filter Black?
All the parts found inside a furnace play an important role. Even “small” parts such as the filter serve a vital purpose. A filter collects the impurities running through the furnace. By capturing the impurities, the filter helps the furnace work properly and ensures that it doesn’t circulate unhealthy air. In some cases, a filter can turn black during use. There are a few reasons why this may happen. The Filter Is Old A filter collects dirt, dust, and more. Over time, all that debris piles up and collects on the filter. The filter
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