Hotpoint Aquarius Dishwasher FDW60 not cleaning properly

[Fenela]

I have a Hotpint Dishwasher that has been working perfectly up until a few days ago when I went to put it on and the delicates light was flashing. It would not let me change the programme to put the machine on so I turned the machine off and waited for a while. This stopped the light flashing, but the next wash did not clean properly at all and all the stuff was still wet when I took it out.
I have cleaned all the fliters but it is still not cleaning correctly. It feels as though the machine may not be heating correctly??
Please, any advice would be great as I cannot afford to get the repair man out at over £100!!

 

[rocks1]

Thermistor has gone. Located behind the dispenser. But if you phone hotpoint it will be done foc. It's on a recall hotlist. The pcb will be changed that will cure the fault.