Stoves newhome DF600 SI DOm grill tripping electrics out?

I have had this oven for a while and have already replaced the bottom oven element, but now when i turn the grill on it trips out my electrics? The strange thing is that the top OVEN still works fine? And as theyre on the same heating element i wasnt sure if that was the fault and i dont want to buy a new one only to discover i need a new oven!? Anybody help? :)