mackrmodel686st Posted January 10, 2017 Share Posted January 10, 2017 I've got a 2001 cx613 Mack vision that doesn't switch between defrost, floor, dash and mix. I've replaced the controls but didn't fix the problem. I don't see any burnt or melted wiring. Can anyone point me in the right direction on how to fix this issue? Quote Link to comment https://www.bigmacktrucks.com/topic/48308-2001-mack-cx613-heater-controls/ Share on other sites More sharing options...
alex g Posted January 10, 2017 Share Posted January 10, 2017 Not sure but in my R model it has air cylinders that move duct work to change heat flow. Could be cylinders not moving properly or duct work unhooked or stiff. I had heat problem in my R it was the cylinder not moving ductSent from my SM-G386W using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/48308-2001-mack-cx613-heater-controls/#findComment-357884 Share on other sites More sharing options...
mackrmodel686st Posted January 10, 2017 Author Share Posted January 10, 2017 The ch613's we have are the same way, but I think the cx613's are electric. Quote Link to comment https://www.bigmacktrucks.com/topic/48308-2001-mack-cx613-heater-controls/#findComment-357887 Share on other sites More sharing options...
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