How To Change Filter On Outside Ac Unit. This is a very easy do it yourself job. For any other kind of system look for the air filter behind the return air grill on the wall ceiling or utility closet door.
Replace Air Filter in Window AC Unit The first step on how to change an AC filter is by turning off the AC and unplugging the unit. 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. Carefully slide the new or cleaned air filter back into the housing with the airflow arrows pointing in the correct direction.
How to Replace Air Conditioner Filters.
If youre unsure of the type of filter to use your Lennox. A good rule of thumb is to not let any plants or other wildlife grow within a 2-foot radius of your air conditioner. All you need to do is take out the old filter replace. 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.
