Along Folsom Street in Boulder, Colorado, weak airflow may improve when you replace heat pump air filters, but persistent issues can indicate a repair need. Reach Mesa Plumbing at (720) 680-2303, located at 1740 38th St, Boulder, CO 80301; serving Superior, Erie, Gunbarrel, and Longmont. https://www.mesa-plumbing.com/heating/heat-pump-services/