Panasonic NA-140VS4 Fault Code H17

I have a Panasonic NA-140VS4 Washing Machine that is giving a H17 fault. This is apparently a thermistor fault. I have acquired a spare but I was wondering whether anyone could save me a lot of time in dismantling by telling me where this part is. I had assumed it was at the rear of the machine but having removed the back I can see no sign. If anyone knows or could point me to any service documentation (I can’t find any) I would be most grateful. I’m particularly keen to repair this machine. It is just out of its 5 year warranty and just before the end it had the drum, seal and motor replaced so mechanically it will be good for a few more years. Hope someone can help. Thanks.