The blower assembly has little tabs that engage the stove body. It's easy for them to miss, which means the assembly is sitting on the floor with a slight gap, which severely screws up the sensor contact. This is a very common issue.Only news on the HI200 is that the fan stopped working in auto mode. It was only in the 40's last night so just had a small fire. It was plenty hot, though. The fan should have kicked on. I ran it in manual on low. Will call the dealer today. It causes me to wonder how big a role the blower plays in preventing overfiring the insert?
Pull out the assembly, locate the hooks/tabs, lift the assemble as you slide it back in so that the hooks engage the slots in the stove body. Should solve it for you.
Since it had been working fine, I didn't think anything of it until the blower still hadn't turned on after the door was closed for more than 30 min. I turned it on using manual at that point and as you suggest tried it in auto several times during the course of the night. It just turned off. In your case was the blower ever working in auto before the adjustment or did you need the adjustment to make it work?