Near 42nd Street in Boulder, Colorado, Mesa Plumbing can diagnose a noisy furnace and unusual odors (musty or moldy) noticed after the first run. Contact (720) 680-2303 and visit 1740 38th St, Boulder, CO 80301, serving Superior, Niwot, Longmont, and Erie. https://www.mesa-plumbing.com/heating/furnace-repair/