Why isn’t my furnace filter dirty?

A filter is designed to catch all the air that goes through your air conditioning. Because of this, it needs to fit snugly inside the holder to have a chance at catching the air. … When that happens, the filter won’t get dirty because all that air isn’t going anywhere near it.

How do I know if my furnace filter is dirty?

What Are the Symptoms of a Dirty Air Filter?

  1. Filter is a different color. …
  2. Energy bills are higher than usual. …
  3. Low air flow. …
  4. Rise in physical issues. …
  5. Headaches. …
  6. Allergies. …
  7. Carbon monoxide poisoning. …
  8. Forces HVAC systems to work harder.

Why is my furnace filter so dirty every month?

Your filter gets clogged faster when your furnace is running more often. That’s because more air is cycled through your filter when your furnace goes through more heating cycles, so more contaminants get caught on the filter’s media. … That’s why it’s extra important to check on your filter every month during winter.

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Is it better to have a dirty furnace filter or no filter?

NO. A furnace filter has a critical job to perform and a filter cannot be run without one. For a furnace to work properly, it should always be equipped with a clean, working filter. As we’ll see, a dirty filter can cause problems, and so can having no filter at all.

What happens if you don’t clean your furnace filter?

Short Cycling. If the air filter is not serviced often enough, it will eventually become clogged to the point that air cannot pass through it. When the furnace is operating, the lack of air flow will trap the heat in the system. … Without a new air filter, the furnace will overheat every time it starts up again.

What problems can a dirty furnace filter cause?

Furnace Issues Caused By Dirty Air Filters

  • Damage to the Heat Exchanger.
  • High Heating Bills.
  • Poor Indoor Air Quality.
  • Clogs May Cause the Furnace to Shut Down.
  • Inability to Reach a Comfortable Temperature.

Can dirty air filter cause furnace not work?

1. 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.

Why is my air filter dirty so fast?

When your A/C is on the thermostat fan will constantly be running causing air too run over the air filter continuously and causing it to get dirty more quickly. … You may have a leak in your air ducts – Leaky air ducts can also cause your filter to clog up and especially if it is near your AC unit.

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Why does my house filter get dirty so fast?

More people walking into your home increases the amount of dirt and contaminants in your home. Furry pets also introduce hair, dirt, and pet dander. And the more contaminants floating around in your home, the faster your filter gets dirty.

How long should furnace filters last?

Change Your Filters Regularly

For example, a one inch furnace filter should be changed out every one to three months. A three to four-inch filter can last for six to nine months. If you have a thick five to six-inch filter, it can last from nine to twelve months.

Can you run a furnace without a filter for one night?

If you run a furnace without a filter for one night, it won’t affect your HVAC system detrimentally. However, the longer you run your heating system without an air filter, the more contaminants will accumulate inside your heating unit’s inner mechanisms.

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.

Can I vacuum my furnace filter?

Vacuuming your furnace filter will remove the build up of dirt and dust that impedes airflow through your system and increases your cooling systems run time. Vacuuming your furnace filter will not likely extend the life of your filter though.

How often do I really need to change my furnace filter?

In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.

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How often should you clean furnace filter?

The general rule is to change a furnace filter—usually located behind a return-air vent or in a slot on the furnace itself—at least once every 90 days.