I wish I could offer help troubleshooting your problems, but I really don't understand how these things work. All I did is follow the recipe for building the Heatermeter and Adapt-a-damper. Then I set the fan to come on at 50%. That's about all I know. Sorry.Could you please attach a screen shot of your configuration? I have inverted the servo but not the fan. When I change the set temp to a negative value, the fans and servo kick in but any positive value, it turns off and there is no movement in the fan or damper. When I invert the fan, the fan is on constantly. Thank you.