I have recently this summer renovated my 165 with all new insulation top sides and bottom, new blower/damper system from altheating and have completely gotten rid of the rear cover and water coil. I thought my steaming issues would be solved but ive noticed in the last 2-3 weeks ive had steam coming from overflow when its coming up to temp. ranco is set on 170 with 7 degree differential. ive seen water temp up to 175(blower off). I thought it was my circulator bc the speed was on low so I tried it on med and high, seems better on high but still steams. do I have an air leak allowing more air in firebox or should I modify the overflow like lappin said? the first few weeks I burned, I went 2 weeks without adding water and when I did valve only on for few seconds. the last 2 weeks its been steaming and it took probably 1-2 min to fill. id love not to add water all the time and id love to stop the steaming. Thanks Adam