I just got a new Goodman high efficiency 95% furnace installed 2 days ago. It worked nicely from the start, but now two things are starting to worry me.
#1. It seems the inducer draft motor/fan is running louder. - is that normal?
#2. (This just started about 3 hours ago) There is a noticable "bang" in the furnace right before the inducer draft motor starts. Is that normal? It wasn't there before.