Siemens HB750550B/01 Fd 8511 Single Oven Home › Forums › Trade Technical & Spare Parts Forums › Trade Technical Enquiries › Siemens HB750550B/01 Fd 8511 Single Oven This topic has 2 replies, 2 voices, and was last updated 1 year, 5 months ago by rocker. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts October 26, 2024 at 11:03 am #103042 rockerParticipant Called to check the problem. When the owner switched on it blew the rcd…Fault on screen (Shows E4 ) I checked the elements found the grill element has earth leak…disconnected….but when turned on can’t clear the fault code….any advice welcome..John October 26, 2024 at 12:39 pm #491578 electrofixModerator according to owners manual error 4 is temp sensor i would check that have you tried putting a load across the element terminals what i am thinking is you have to disconnect element to stop tripping but maybe computer is looking for a circuit Dave October 26, 2024 at 1:31 pm #491579 rockerParticipant I will look into that cheers Dave..John Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In