Follow the airflow path through the home
A Carmichael comfort complaint should identify which rooms receive weak airflow and whether the problem occurs in both heating and cooling. That pattern can help distinguish a distribution issue from a single operating-mode failure.
Before choosing a stronger filter or replacing a blower, check the filter size, return path and equipment requirements. Filter efficiency and airflow need to be considered together; a higher rating is not automatically suitable for the existing cabinet.
For gas & propane wall furnace repair, bring airflow and filtration into the scope discussion. Identify the brand, model and fuel before discussing repair or replacement. Williams and other wall-heater product families have different designs and part requirements. Any fuel conversion must use approved equipment-specific methods and qualified installation.