Our CR970 started giving us erratic fan speeds and our dealer is stumped. It is the hyd. drive fan and is sending wild voltages to the PWM valve. We changed out the CCM1 box today, thinking it was a controller issue, that did not help. There are know other parts available to try the change and hope method and my dealer is really struggling at this point to find the real problem.Monday we can of course contact some New Holland higher-ups and hope for some help. Any advice will be truly appreciated.