Instructions on Changing Furnace Air Filters

Changing the air filter on your furnace will increase its efficiency and prolong the life of the furnace. These filters serve to filter out dust and debris from the air to prevent them from entering the motor of your furnace. A clogged filter will cause your furnace to work harder just to draw in the air it needs to function properly. Keeping the filter clean improves the performance of your furnace and saves you money on utility bills. There is no need to call a serviceman; air filters are quick and easy to replace.

Things You'll Need

• Air filter Owner's manual

Instructions

1. Check your furnace manual to determine where the air filter is located. Look in the blower door or between the blower and the return air duct. Air filters are designed to be removed and replaced easily and should be visible. Open the access panel and slide the filter out. Foam filters may be held in place with metal brackets or wires. Use care not to bend the wires when removing the filter.

2. Look for a filter installed in the clean air duct. There should be a slot that allows you to easily slide the filter out of the duct to replace it.

3. Inspect the filter for dirt. Hold it up to the light and examine closely. If the filter allows light to pass freely, then it is fine. If light is blocked by dirt and debris, the filter needs to be cleaned or replaced. Examine foam filters for any signs of wear.

4. Discard fiberglass or paper filters and replace with the appropriate filter. Vacuum foam filters with the upholstery attachment to remove heavy buildup of dirt. Wash in warm soapy water and rinse until all traces of soap are removed. Hang to dry. You can often clean a foam filter several times before it needs replacing. Replace when the filter shows signs of wear.

5. Avoid the temptation to purchase inexpensive filters at discount stores. These are often cheap imitations and do not work as well. Purchase the type of filter recommended for your particular furnace to maintain optimal performance.

Tips & Warnings

• Check your air filter often, particularly if you have shedding pets. Hair clogs filters quickly. Call the manufacturer of your furnace or a repairman if you cannot find the filter in your furnace. Provide the make and model of your furnace.

• Always turn off the power to your furnace before attempting to access the filter.