hi, the people who used to live in my house never bothered to use a air filter with the central a/c. regardless, now the a/c won't cool the house, I have cleaned the filters inside where the air pulls thru(was veeeeeeeerydirty). The air flow coming out of the vents is minimal, and the temperature is room temperature. Is there any way I can fix this avoiding a costly repair man, could it be a lack of freeon? e-mail me firstname.lastname@example.org with any ideas or thoughts.