Siemens HB12450GB/03 Fan Oven Element 2500W Also Known as Siemens Main Oven Element Length: 250mm Width: 195mm Bracket: 70mm Tags: 25mm. This is a premium quality 3 turn replacement element for you cooker. If you need any help on how to replace element please send us a message. This element is secured in man assisted oven using 2 bolts from back of cooker. Is your fan oven not heating up, Check if temprature light and fan are working if yes then this the element you need to replace. If you need any help on how to replace this element please send us a message. For electrical saftey cooker must be disconnected from electrical supply while replacing element. Part must be fitted by competent person.