Pulling out your furnace air filter and seeing it covered in black may be alarming. There are a few explanations as to why your filter may turn black. Today we will be diving into the reasons your furnace filter may be black and what you should do in each situation.

Dirt, Dust, and Debris
A furnace air filter is designed to catch dirt, dust, and debris to keep them from flowing through the system and out of your ducts. These particles are caught in the filter and may turn the filter black if you go an extended time without exchanging the filter. If your furnace filter is black and you can’t remember the last time you changed it, replace it and remember to keep up with swapping out your old filter every 90 days.

Carbon Monoxide Exposure
Carbon monoxide is a poisonous gas that can cause serious harm to your health. Carbon monoxide is typically colorless and odorless but can leave a black soot-like appearance on your air filter when caused by a gas or exhaust leak. When encountering a black air filter during furnace maintenance, you should immediately inspect the carbon monoxide levels in your home.

Inadequate Air Flow
If air isn't properly flowing through your furnace, this could cause your air filter to gradually turn black. This may be due to a clogged venting system or a leak. If you aren't able to pinpoint the cause of improper airflow, it's important to schedule an appointment with a licensed technician from Maple Air Heating and Cooling, serving the Greater Toronto Area, to perform furnace maintenance and eliminate serious issues that could be harmful to the health of your system.

Mould Growth
Condensation may mix with the dust and dirt moving through your unit and form black mould. This mould, if left uncared for, will grow and spread to your furnace and filter. Mould can also form in other areas furnace system, including the ducts and spread to the filter. Regular furnace maintenance in the Greater Toronto Area, performed by Maple Air Heating and Cooling, may help avoid black mould from spreading through your heating and cooling system.

Furnace maintenance in Vaughan, and surround areas, isn't something we always think about. Often, we turn the heat on, enjoy the warmth and think no more about it. However, it's important to keep an eye on your furnace and air filter to make sure everything is running smoothly. Assure your furnace is functionally well all season long by scheduling an appointment for furnace maintenance with a certified technician from Maple Air Heating and Cooling serving the Greater Toronto Area. Contact us today to schedule an appointment for your furnace to be maintained.