yet another perfect pass problem

Gary just sent me a new paddle wheel and module. 1st day it worked great. Now the set speed is 22 and the actual speed (according to the display) goes from 22 to 24.6 in a split second and sometimes the # sign comes on the display even when the actual speed (according to the display) is higher then the set speed. Anyone else have this problem. I did the old Microsoft fix all reboot Ctrl-Alt-Delete reset and it didn't fix it. Thanks, M.