Knowledge Base

First please make sure the unit is set to Impeller mode when you go to Main Menu->Setup->Input. Next make sure the impeller is free of any debris and is spinning freely. The next thing to check is the location of the impeller versus the impeller pickup coil. These need to be positioned above each other and as close as possible. The GPS has even greater sensitivity than other SpeedCoach models, so if it works for say a SpeedCoach Gold, but not a GPS, you will need to move the impeller and impeller coil even closer together (if at all possible). See next question on how to properly mount an impeller.