I have a question/concern I was hoping the group could help out. I have an Osborn Stratford stove. The stove has 2 air movement systems. The small fan built into the back of the stove and a larger forced air kit fan which moves air through duct work 20feet. The forced air kit if u are familiar has a high and low fan speed which are set at certain temperatures. Ie low fan kicks in at 125. High kicks in at 220. This is based on a temperature reading on the stove, not a thermostat on the wall. In my set up. Now my question is the fan does not seem to want to kick into high speed sometimes. Sometimes! Sometimes it does. Even when the stove is very hot. Anyone else ever experience this. If so how did you fix or trouble shoot the problem.