In-laws recently had two new Bryant Furnace Model 355MAA installed. The furnace that service their basement has a distinct whistling sound when there is call for heat. The company that did the install stop out and said that they are not sure why it whistles. Anyone here have any ideas as to what may be the source of the whistle sound?
Also my father-in-law said the inducement motor sounded loud and rattle a bit when they had the front panel off. The noise is not noticible when the panel is on. Tech said this is normal. Is it?
Thanks for the help.