The rest of the control panel works ok, controls where the air goes, what turns on, etc. Fan control does not respond at all. Fan is stuck on high. Fan continues to run on high even with ignition off. Had to pull 40amp fuse for blower motor in under hood fuse panel to get it to quit. Ideas of where to start? Edit: Although my sig shows a 2005 suburban (which is correct) this is a 2005 Escalade that I drive for work, and is company owned. It is built 9/2004 if that information is important. The Suburban is built the same month.