Hoover VHC 180 Hell =( (Drier)

Hi all,
Was having a look at a friends VHC 180..apparently it just kept tripping out the rcd so he showed me and I took it back to my shed to dissect..

I found that there was a 3 Amp fuse fitted so changed it out for a 13 and lo and behold she starts running for me..

THEN… the door switch seems to not work (Door can be opened during cycle) so I stripped machine down but Door switch elctrically and mechanically fine…

Then i notice the on/off switch wont turn off…Dont think its a latching switch on it.. Breaks connects electrically ok though…

Then i notice scorching on the top of the timer where a little white wire comes from the back of the timer.. Now the timer functions perfectly…etc and will shut off when the machine is running…

So I told my pal that it was working but that the door was capable of being opened during flight etc and he says grand , its only for my own use I can live with it etc..

So i clean it out and fix some seals that came off etc and bring it around..Plug it in and click goes the rcd…
SO i bring it straight away back home and plug it in and she works fine (Albeit with the door/on/off switch problems)

Can anyone help me with this? Ever come across this before..Very very bizarre, and I did try the machine in different sockets in his house..

Any help GREATLY appreciated please!!
Thanks