Model # 00621W2 - Batteries died in the wall unit. Changed them and also changed the ones in the outdoor unit. Display unit now reads the number 8 everywhere. Tried to reset so we could set the time. But now set button has no effect on the display. We also changed the CR2032 in hopes that this would solve the issue. Still no change. Also we left the batteries out of both units for 10 minutes and then put them back in, hoping to reset that way. The reset button in the battery compartment is working, the screen goes blank when we pushed it. Although, still reading 8's everywhere and set button still does not have any effect. Please help.