Bosch WTV74307 t/dryer Home › Forums › Trade Technical & Spare Parts Forums › Trade Technical Enquiries › Bosch WTV74307 t/dryer This topic has 2 replies, 2 voices, and was last updated 15 years, 11 months ago by Islander. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts April 26, 2010 at 3:19 pm #54209 IslanderParticipant When you switch on machine F12 comes up on display straight away, cannot start dryer or do anything at all. Many thanks. April 26, 2010 at 5:17 pm #318860 nomadPaulParticipant F:12 is a variant coding problem. Have you changed the control module for any reason. it basically means the module has been coded incorrectly or needs re-coding. April 29, 2010 at 4:47 pm #318861 IslanderParticipant Re: Bosch WTV74307 t/dryer When customer booked the call F12 fault was already showing. Is there a way to recode the module without having to change it? 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