Complete 2 system furnace repair and preventative maintenance check. Found upstairs to be very old but working customer already has plans to replace in spring. Main level furnace 9 years old with silicon build up on both flame sensor and ignitor and need to be replaced. The blower wheel is dirty and needs to be cleaned and the system missing secondary float switch for a drain line. The system also needs inhibitor installed to kill bacteria allergens and odors in the house to improve the wellness of residents.