Arrived on location customer present. Replaced flue pipe, cap and rain guard on both furnaces from the roof. Fixed flue pipes to proper angle inside attic for both units. Replaced drain pan 30 x 30 on smaller unit/master bedroom unit. Installed pan float switch on both units. Installed T6 thermostat for master bedroom unit to regular type. Replaced 3 filters; 20x30x1, 20x20x1, and 20x20x1. Units are properly working at this time.