Indesit D41 Dishwasher - Tripping Power?

Hi - My Indesit D41 Dishwasher is causing the power to trip out each time it is turned on. Tried different sockets. Haven't yet changed the fuse. It started half way through a cycle when the water was hot. Suggestions have been that the heating element may need to be replaced. Any ideas if this is a fair assumption? Also would £80-£100 be a fair price for a replacement part (Plus £35 call out fee)? A quick search shows you can pick this up for way less, obviously I couldn't change it myself! Could also just about get a new one for that price. Any help or info would be appreciated. Located in East London.