66glide Posted March 9, 2017 Share Posted March 9, 2017 Customer complaint of loud cooling fans...even in this winter weather. All modules are at latest level programming. No codes. All data appears normal on IDS. I can manipulate fan speed with the scan tool. What am I overlooking? Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted March 9, 2017 Share Posted March 9, 2017 Check the a/c pressure pid. We had one that was way off the chart and kept the fans kicked in all the time. Quote Link to comment Share on other sites More sharing options...
mchan68 Posted March 9, 2017 Share Posted March 9, 2017 Low coolant level, causing higher cooling fan duty cycle command??? Quote Link to comment Share on other sites More sharing options...
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