Help!! Car won't start for RAC

Does anybody know what might be the issue. Car won't start. Got RAC out and no joy. Cant diagnose it, computer not giving anything, immobilizer light stays on, barely turns over. Battery is fine. Few oddities as the fan comes on immediately when turn ignition.
After almost 2 hours I have to leave it where is to find an auto electrician and then recover vehicle there.
I'm at a loss and don't want Renault robbing me.
Help appreciated.
 
Does anybody know what might be the issue. Car won't start. Got RAC out and no joy. Cant diagnose it, computer not giving anything, immobilizer light stays on, barely turns over. Battery is fine. Few oddities as the fan comes on immediately when turn ignition.
After almost 2 hours I have to leave it where is to find an auto electrician and then recover vehicle there.
I'm at a loss and don't want Renault robbing me.
Help appreciated.
@Foxspeed any ideas tx kevin
 
Crank sensor or steering lock possibly? Though I would have expected the RAC to have checked these.


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turns over slowly...battery ok? fan comes on?

voltage drop ok when cranking? have the earths/fuses been checked?
 
My mate came and if he rocked the car and tried starting it, it actually turned over but otherwise not so much. The immobilizer light stays on and the fan comes on too.
RAC was useless. I gave him a below average score on his fecking laptop