Hi all I 'm new to the forum. I have an enviro emperess insert stove about 4 yrs old been and still works fine. But one concern after the stove is shut off the circuit board intermittently clicks like a relay pulling in and out. Not constantly. And after a few hours it stops. I cleaned the stove completely a few weeks ago because it was due. I always keep the burn pot clean and the holes port and vac it out after 3 bags or so. As I say it run fine. Thanks. It's not a cool down heat contraction noise it appears to come from the control board area or at least that side of the stove.