Arrived for furnace check. Furnace is 22 years old. There is lots of rust and spots of concern on the heat exchanger. A hole in the heat exchanger is a risk of carbon monoxide leaking into the home. The blower wheel is very dirty and needs to be cleaned. The blower motor is running very close to max amperage. There is only a 37 degree temp rise, would like that to be about 50. I did get the humidifier working properly. My field supervisor Dre is out to discuss best solutions. Thanks for choosing LBA.