Why is my furnace filter dirty after one week?

A clogged filter can cause a variety of problems, including expensive breakdowns and system inefficiencies. If you’ve noticed that your HVAC filter is getting dirty more quickly than usual, it could be caused by one of the following issues: The thermostat has the fan setting in the “on” position constantly.

Why does my furnace filter get so dirty so quickly?

Leaky Duct Work

According to ENERGY STAR, a typical house loses 20-30% of air through leaks in the duct work and poor duct connections. Leaving these untreated can not only kill your furnace filter quickly, but also result in higher energy bills.

Why is my furnace filter black after one week?

When you run your air conditioner, the evaporator coil will become damp from condensation. If left for a long period of time, that condensation will mix with the dust and dirt and form a black mold. This mold will grow and eventually spread to your furnace, and the filter.

Why are my air filters getting so dirty?

Ducts that have holes, gaps, or leaks should be sealed up properly to prevent good air from getting out and bad air from getting in. If there is a leak in the return air ducts, the dusty, dirty air from spaces like that attic or crawl space gets sucked up into the ducts, dirtying the air filter and causing clogging.

IMPORTANT:  Can a clogged air filter cause no heat?

Is no air filter better than a dirty one?

Running your air conditioner without a filter is worse than running it with a dirty one. Instead, get to the store as soon as possible for a replacement or call an HVAC professional for replacement. Without a filter, your air conditioner is at risk for severe and expensive problems.

How dirty should an air filter look?

1) Your Air Filter Looks Dirty

If your air filter is clean, it should be white or off-white. Over time, as dust and dirt accumulate on it, the air filter will get darker and the dirt will be noticeable. When it starts looking dark and grimy, you might be due for a replacement.

What does black mold look like on furnace filter?

You can typically identify black mold by its color. Many other molds are green or grey, but black mold tends to be a dark greenish black or gray color. It will appear around the home as a slimy, dark greenish-black or gray substance. Black mold grows off of moisture, releasing spores as it consumes organic substances.

What would cause a furnace filter to be black?

If the dirt collected in the furnace is left wet for an extended period, sooty mold can develop and later spread to the furnace filter. Many of the central heating systems that are not cleaned regularly have grown mold, which causes the filter to have a black color.

What would cause an air filter to turn black?

If you’ve recently changed out your air filter and noticed it was black, you’re experiencing something called “black soot deposition. Essentially, black soot deposition is just an excess build-up of soot, which is typically the result of: A gas appliance or fireplace that isn’t burning fuel properly. Scented candles.

IMPORTANT:  How many Litres does a Brita filter last?

Can dirty air filter stop furnace?

Dirty furnace filters

Dirty air filters are often the culprit behind an inefficiently performing furnace. That’s because air filters trap dust, dirt and debris like hair, which over time can restrict or block vital airflow, overheating the heat exchanger and preventing your furnace from working as it should.

What happens if air filter is dirty in house?

If the filter is very dirty, you may even feel warm air coming out of the back of the unit. A clogged filter forces the air conditioner to work harder to keep the house cool. This will lead to more frequent AC repairs and, ultimately, shorten the lifespan of the unit.

Why is my furnace filter gray?

Lots of Dirt and Soot

An air filter collects dirt, dust and other impurities. Look for the filter to turn dark gray as it catches a lot of these things. … Eventually, they reach the furnace’s filter. Residue made inside the furnace might result from a mechanical or other problem.