I bought a house that has a 15 yr old Jenn-Air gas stove (Model
CG205W). A few weeks ago, I heard a knocking noise coming from the
stove when the stove is off. It's a continuous noise in which the
knocks are about 1/2 second apart. This isn't the clicking noise made
when you turn on the stove. Any ideas what this is?

Thanks
Bill