Arrived for furnace check today. Static is passing. Heat exchanger looks good. Carbon monoxide test was 0ppm. All electrical components are running in spec. There is a 56 degree temp rise. The humidifier pad was dirty, with approval I replaced it. Humidifier is working properly. Lower wheel is dirty and needs to be cleaned. You will be ready to do that come ac check. System is running upon departure. Thanks for choosing LBA.