I feel I have my regency epa stove pretty dialed in. Last night did a normal load. Packed it tight, let it get to operating temps then cut the air back. Normally the secondaries kick and it cruises around 600 (I have a ventis thermo on the stove top) for hours before Slowy cruising to that 400 coaling stage. Last night all the same but came down about an hour later for something and the secondaries were going crazy and the temp was 800 and the air was shut down. Not sure what made that load take off like that with it shut down for the night. Any thoughts? Door gasket seems to be ok.