Hey guys new here installed my heritage in November. Been burning all the same 2 year seasoned hardwood since. I used to get the secondary's roaring as often as I needed and temps at 500 regulary with the maple and hickory I've got. Out of no where I'd say about a month ago my secondaries dont kick in anymore. Temps are normally around 400. New metal chimney instead in nov as well. Could it be a chimney issue? Can't really cant up on the roof with all this snow right now