I reloaded my stove with 5 Envi 8 blocks and topped it off with cord wood. within 5 mins I shut it down all the way and it was about 400. It continues to rise. Up to 500 now, mainly secondaries. not sure what to do to ensure it doesn't go past 600. It's like the wind is coming dOwn the pipe feeding it. But it is mainly secondaries. Now what?