

1. Black Soot Deposition
Black soot deposition is a phenomenon that affects many homeowners throughout the nation.
This soot is the result of burning various items, including:
- Candles
- Wood
- Oil
- Gasoline
- Cooking oil
- Carpet fibers
Basically, anything that burns can produce black soot. More commonly, though, black soot is a result of poor candle quality. When these candles burn, they produce black soot, which is sucked into your HVAC system. As a result, it turns the filter black.
2. Mold Growth
Unfortunately, mold growth is another big reason your air filter might be turning black. Mold growth can occur if your HVAC system has been damaged, if your indoor air is too humid, or if you haven’t cleaned your HVAC system in some time.
If you suspect you have mold growing in your HVAC system or ducts, you should call for professional help immediately, as too much mold can lead to respiratory issues.
3. Clogged Air Filters/Excess Debris in the AC Air Filter
If your air filters are too clogged or if there is excess debris in your AC air filter, it can eventually cause your filter to turn black. This condition is relatively normal — homeowners must change out their air filters once every six months to keep their filters clean.
Steps to Take
If you notice a black air filter, change your filter immediately. Then, vacuum around the area to remove extra dirt. If the problem persists, you will need to call a professional to change your air filters.
Call Colorado Discount Heating & Cooling Today!
If you notice a black air filter, it may be indicative of a problem with your HVAC system. When this happens, it’s important to call Call Colorado Discount Heating & Cooling to service your HVAC system.
With trusted brands, straightforward communication, and honest prices, we’re excited to assist with your HVAC maintenance. Plus, when you book a maintenance service, you receive a 10% off guarantee against the need for future repairs.
If you’re in the Englewood, CO, or the Denver Metro area, give our team at Colorado Discount Heating & Cooling a call today!