Completed diagnostic on one comfortmaker gas fired furnace diagnosed the tube for the air pressure switch was clogged removed tube and cleaned highly recommend to perform a maintenance on the system system is nine years old homeowner stated he is waiting for a quote for the replacement of the system from innovative air solutions office personnel please follow up with the homeowner for the quote and to schedule a maintenance on the system left system working after checking for carbon monoxide and none was Detected View visual findings from this job here - https://visionshare.xoi.io/?id=XA-213F-21C3FC295FD7436E9F89F42505AA2F4A Maintenance Agreement