Siemens Oven HB750550B/02 Home › Forums › Trade Technical & Spare Parts Forums › Trade Technical Enquiries › Siemens Oven HB750550B/02 This topic has 2 replies, 2 voices, and was last updated 17 years, 7 months ago by Bryan. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts September 2, 2008 at 3:06 pm #39167 BryanParticipant Not been to see this one yet but customer tells me Er:15 in display. Can’t find any reference to this fault code, customer reckoned she was using the grill at the time. Any help much appreciated. Bryan September 3, 2008 at 7:32 pm #261512 nomadPaulParticipant Re: Siemens Oven HB750550B/02 Bryan , Er:15 is a ‘cooker too hot’ error – it means the interior of the oven has gone above 350*C and locked the door. Never seen the fault personally so have no idea what might be the cause September 4, 2008 at 10:58 am #261513 BryanParticipant Re: Siemens Oven HB750550B/02 Thanks for the reply and yes the door did lock on at the time of the fault. PTC sensor reading 520 ohms at room temp which seemed about right to me, any idea on how to clear this fault code from the display ❓ 😕 Bryan 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