VW Touareg 2014. Blowing only cold air. No heat

My 2014 VW Touareg’s heat stopped working. It would only blow cold air even when set to full heat and the engine was hot.  

I checked the blend doors and the fuses first, all were ok.   The heater control valve (N82) was the problem.  OEM part number 7PP 819 810 A