The 2018 amana furnace was not working. Blower turned off because of high static pressure. We switched from a 20x25x1 filter to a 20x25x4 filter. We lowered are speed to lowest setting. They do not have a humidifier in the home. Today I did a tune up. Put in a 4" filterThey signed up for 1 year monument club. They are going to think about a humidifier. Furnace was running when i left.