2007 eos interior fan running when accelerating

[Jjohare]

Hi,

As per the title my wife 07 eos developed a weird issue on a long trip last week. Suddenly whilst driving the check engine light came on and the interior fan started going up and down with the accelerator pedal. 

I took it in to have any fault codes read and it showed up a bunch if codes...all 4 glow plugs, plus a pressure leak/ swirl flap fault?  When the codes were cleared they have not returned BUT the interior fan is still coming in when accelerating and speeds up and slows down with the accelerator.

This is making me consider a possible wiring issue with a possible cut somewhere in the harness causing a short and meaning that the codes may even not be correct?

Anyone had this issue before and have any clue of a rough area to start looking?

Thanks in advance for any help!