Hotpoint FDW60 heater replacement

Question

I have a Hotpoint FDW60 Dishwasher and have error code lights on 4&6 indicating a heater failure. Hotpoint want £90.00 to call out but I have found the part for £38.00.Before I buy the part where is the heater located on the machine and is it just a case of removing two pipes and electrics. Does it have anti tamper screws etc. Thanks in advance for any help