Performed heating maintenance on one Luxair gas fired furnace removed and cleaned igniter and flame sensor and clean burners. Also inspected blower motor and lower wheel diagnose. The draft inducer is compromise. Highly recommend to replace draft inducer and air pressure switch. Please see photos for detail details. also replace filter 16 x 24 x1 Model number of system isTG8S120C16MP11A Serial numberW1K1319719 Office Personal please follow up with pricing a quote to the landlord for draft inducer and air pressure switch also recommend for a chimney company to inspect the chimney due to the vent, may have blown off as seen in pictures