Change Furnace Filter In Attic

The arrows indicate that air is being pulled into the register air handler so make sure the arrows point into the system not towards the house.

Change furnace filter in attic.

Depending on your lifestyle and the type of. Turn off the furnace s power at the circuit breaker on the main electrical panel. Access the attic furnace. Look for a filter slot right where the return plenum contacts the blower fan assembly marked as air filter slot and yellow arrow in my photo.

How to maintain an attic furnace. Actually you should check your filter monthly and often change it monthly depending on the type of filter you use. Check the filter monthly to see when it needs to be replaced. 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.

Dispose of it and replace it with a new filter of the same size when it gets dirty. In some cases especially on older models the filter may be found inside the blower cabinet. Look for a filter cabinet along the sides top or bottom of the blower cabinet. Wipe down the area around the slot or filter area with a cloth to remove dust.

Changing a home furnace filter regularly is the fastest and easiest way to make sure your furnace is running smoothly and efficiently as well as to help purify the air in your home. Apply a non contact circuit tester to the furnace to verify. The filter may be positioned horizontally or vertically depending on the orientation of the air handler in the indoor unit. If you re thinking that you only have to change your filter once a year you may well be shortening the life of your furnace.

To determine if it s too dirty remove the filter and hold it up to the light.