I've been reading through these post and I'm confused about something. The person who I bought my boiler from told me, and set my teeth at 6 teeth. He said that when that thumb screw is in the 12 noon position, its 6 teeth. With this cold weather,the boiler was not making enough heat. Upon reading this post, I'm finding out that my boiler was set at 4 teeth. I did put my hand in the motor and spun the wheel and counted the number of clicks by the blue thing on the left (10pm position). It went up and down 4 times. I changed it t 5 clicks and set the air at 4.5.
Here's what's got me confused. The efm manual says that you can go as high as 10 or 11 teeth, but it looks like that thumb screw can only go as far as 6 or 7 teeth. Something is not adding up. Are the teeth measured by the number of times that blue thing goes up and down, or by the number of teeth being pushed by the black flapping thing near the curved shaped metal piece.
I'm sorry that my terminology is terrible. Thanks.