How can you tell if your furnace filter needs changing?

5 Critical Signs That Your Furnace Filter Needs Replacement
  1. Your Bills Creep Up. If your bills have been cranking up, dirty and clogged filters might be the culprit. ...
  2. You're Getting Sick. ...
  3. You Notice a Burning Smell. ...
  4. Less Heat, Longer Runtime. ...
  5. Your Home is Dustier than Before.


How do I know if my furnace filter needs to be replaced?

The best test to know if a furnace filter is ready to be changed is to hold it up to a bright light . If you can still see light through the filter then air is still getting through the filter. If you suspect the filter is dirty enough to restrict the air flow, then change it out to a new filter.

Do I need to change my furnace filter if it doesn't look dirty?

If your filter isn't dirty despite your air conditioning seeing regular use, then you should inspect the filter to make sure it is installed correctly. If it is, and you aren't making any efforts to keep dust out of your house, call a professional to make sure nothing is wrong with your air conditioning.


What happens if you never change your furnace filter?

Without a new air filter, the furnace will overheat every time it starts up again. This is referred to as short cycling. Dirty furnace filters cause your furnace to work harder than it should due to a decrease in airflow. The harder your furnace works, the quicker its parts will wear out and need repairs.

What problems could happen if a furnace filter is dirty?

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.


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



What are the signs of a dirty air filter?

8 Dirty Air Filter Symptoms: How to Know When to Clean Your Air...
  • Air Filter Appears Dirty. ...
  • Decreasing Gas Mileage. ...
  • Your Engine Misses or Misfires. ...
  • Strange Engine Noises. ...
  • Check Engine Light Comes On. ...
  • Reduction in Horsepower. ...
  • Flames or Black Smoke from Exhaust Pipe. ...
  • Strong Fuel Smell.


What does a bad furnace filter look like?

Filter is a different color

If you notice your filter is severely discolored and covered in dust or hair, this is a very obvious sign that your filter needs to be replaced. The particles that you find on this dirty filter are more than likely getting spread throughout your home's air.

Can you change a furnace filter while its running?

1. 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. This will help protect your HVAC system from loose debris or maybe a loose filter fitting escaping into the duct.

How often should I change my furnace filter in the winter?

Professionals, 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.


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.

Why is my house so dusty?

Both low humidity and high humidity play a role in why your house is so dusty. When the air is dry, your air can be extra dusty. But when it's too high, it can feed mites and promote mold growth. If your air is dry, run a humidifier so that you can reach a comfortable level.

How long should a furnace filter 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.

Should I change my furnace filter in the summer?

Frequent filter changes will help to increase the lifespan of your entire HVAC system. So, yes, your furnace filter needs to be changed even in the summer. Don't let dirty filters hinder the work of your HVAC system or harm your indoor air quality, regardless of the season.


How long can you run a furnace without a filter?

Still, they warn only to do so if it's absolutely needed. At most, you can run it for two days without a filter. The preferable option is running the filter for one day without it.

How often should you clean furnace ducts?

Experts advise having your air ducts cleaned every 2 to 3 years to prevent many maintenance and health problems before they start. However, homes with pets or children with allergies should have their air ducts professionally cleaned more frequently than the recommended average.

Does furnace and AC use same filter?

While many people refer to air conditioning and furnace filters as if they're different, this is not the case. Your furnace and your air conditioning system use the exact same filter, so there's no need to worry about purchasing separate filters for each piece of equipment.

Why is the furnace blowing cold air?

If your furnace is blowing cold air in your home, this is a sign of an issue with the flame detector, gas supply, air filter, pilot light, or condensate lines. Many of these issues are able to be easily solved on your own by sanitizing or replacing components in the gas furnace.


How many filters does a furnace have?

Most furnaces will have a V shape filter system; the system will take 2 filters. The filters go up into the plenum in a V shape. Make sure that when you re-install the top door, it goes over the furnace frame so it engages the safety switch.

How dirty should a furnace filter look?

In all cases, the furnace filter should be dirty on the side that the air comes into the furnace from. If your air filters are dirty in some other fashion, it is likely your furnace is not working properly, or the filter was installed incorrectly.

What happens when air filter is dirty in house?

A dirty air filter restricts the flow of cold air, causing it to build up inside the air conditioner and lower the internal temperature. Given enough time, that buildup of cold air can eventually cause ice to form on the coils.

When should I replace my home air filter?

How Often Do I Need to Change Out My Air Filter? Generally, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days, or 3 months. That can change based on where your home is located (ex. dusty, dry climates), if you have any pets, and the age of your system and equipment.


How often should I change the furnace filter in the summer?

It's a good idea to change your best furnace filters every three months at a minimum and the cheap air filters even more frequently. Not only can it help your system work more efficiently, but it can improve your air quality and reduce the allergens floating around in your home.

How much is a furnace filter?

Although flat filter designs offer the most savings upfront, they need to be replaced more frequently and may cost you more in the long run. Replacing these filters can cost anywhere from $40 to $200 a year.
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