Solo Filter Replacement
You should regularly inspect the air filter on the front of the unit to prevent loss of cooling efficiency.
To access the filter, remove the 3 top facia screws and the bottom 3 facia screws. Then simply pull the entire facia off to get access to the filter.
Air filter housing front
To remove the perforated metal grid keeping the filter in place, please pull from the middle out.
Air filter housing rear
Give the filter a clean, replace the filter in the metal frame and reattach the facia to the front of the unit.