In Coolidge, near West Lincoln Avenue and South Arizona Boulevard performing a diagnostic on a Goodman condenser. Upon arrival, cycled unit into cooling mode. Found intake extremely restricted and upon removing filter, felt hot air coming from ceiling. Insulation needs to be added to attic. Also found no air escaping from attic; highly recommend adding whirly birds. Also recommend adding return air addition to bedroom to take hot air out of room and adding return plenum box.