My auxiliary fan would not turn on at low speed. I will use the Climate control diagnostics tomorrow to look at the pressure and temp. I'm trying to locate the ECT and Refrigerant pressure sensor on my C43. If anyone could give me some ideas and how they look, it would be a great help.

Also is there a way to jumper the sensors to see if the auxiliary fans would turn on? High speed activation is okay so I'm more leaning toward either low refrigerant charge or the pressure sensor itself.

Is the pressure intrusive to the AC closed loop system? I need to find out if I need to evacuate it first.