Quick Answer: How Often Should You Change Your Furnace Filters?

Will dirty filter stop furnace?

A clogged furnace filter can cause a furnace to shut off.

Dirty filters are the most common cause of furnace problems.

Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won’t warm up..

Is no air filter better than a dirty one?

Without a filter there to trap air pollutants, your home’s air quality will deteriorate. That’s because the same air contaminants will just circulate through your home. But what’s worse is that you’re likely bringing even more pollutants into your home on a daily basis.

How often should you change your furnace filter in the winter?

three monthsProfessionals, like our team at Airco Service, Inc. say that you should change your air filter at least every three months. During the winter, when you rely on your heating system more, you want to increase that frequency. During the winter, when the system is in constant use, change it out every month.

How long do furnace filters last?

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.

How do I know if my furnace filter is dirty?

What Are the Symptoms of a Dirty Air Filter?Filter is a different color. … Energy bills are higher than usual. … Low air flow. … Rise in physical issues. … Headaches. … Allergies. … Carbon monoxide poisoning. … Forces HVAC systems to work harder.More items…•

What type of filter is best for a furnace?

BEST OVERALL: Nordic Pure MERV 12 Pleated AC Furnace Air Filters.BEST SMART FILTER: Filtrete Smart AC Furnace Air Filter.BEST BANG FOR THE BUCK: FilterBuy MERV 8 Pleated AC Furnace Air Filter.BEST FOR ALLERGIES: AIRx ALLERGY MERV 11 Pleated Air Filter.BEST FOR PETS: Aerostar Allergen & Pet Dander Pleated Air Filter.More items…

Do you really need expensive air filters?

Yes, in general, the more expensive air filters are more effective, but a single person with no pets and allergies might not need as much filtration as a family of five with three pets and a child with asthma. Also consider how long your air filter will last.

Do you have to turn off furnace to change filter?

To Change Your Home Air Filter, You’ll Need To Turn Off Your Furnace. To prevent the HVAC unit from turning on while you are changing the filter, make sure you turn the thermostat to the “off” position. … For maximum safety, disconnect power from your furnace system while you are doing maintenance.

Can a furnace filter catch fire?

When your furnace is working hard to pull air through, the dirty air filter could eventually get sucked back into the system. When this happens, air flow is compromised and you’re at serious risk of a fire starting at the furnace level.

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

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.

Can you reuse a furnace filter?

If you run a disposable filter in your furnace, it needs to be changed every 2 to 3 months, depending on the size and type. Permanent furnace filters, on the other hand, are designed to be cleaned and reused, so it’s simply a matter of checking your filter occasionally to make sure it’s not too dirty.

Why is my furnace filter getting 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.