I know several people on here have had this issue and used a paper clip to create a small space between the trap door and the tube the air comes out of. I was curious if after doing this you noticed and increase in wood consumption or if it let enough air in when the fan was not blowing to allow water temps to continue to rise.
Also, has anyone wired in an alarm of any kind when water temps get too low? I thought about wiring in a PID with a high and low alarm and set the low at 140 and the high at 190 and put an audible alarm on it and maybe a flashing light to warn me if something is wrong. I'm just not real sure how to wire it in. I suppose a thermocouple in a sump off my second line and pull 110v off the power coming in.