Chris McQuistion came out due to possible humidifier not working. Performed diagnostic. Found customer is a platinum membership and has not gotten annual performance done on both furnace and humidifier. Performed both services. Changed out humidifier pad. Cleaned entire unit. Checked for proper operations. Humidifier working as should. Next performed performance check on furnace. Changed out filter for customer 20x25x1. Wrote date changed on filter. Checked entire system for sequence of operations. System is heating and operational at this time according to manufacture specifications. No issues at hand. This is all complimentary service due to the maintenance plan. No charge today.