Question about Bosch HBL 745 Stainless Steel Electric Single Oven

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HBL 745 error code: "SVL EE CHIP/ CHT BAD OR RTDS NOT CAL". This is displayed on powerup, so display seems to be working. Buttons don't seem to do anything in this mode and oven is unusable. I believe a previous attempt to fix had replaced the display (part # 445414) and touch panel (489274), and I just replaced the temp sensor (418417) with no luck, so not sure what else could be broken.

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  • markahlady Jul 15, 2009

    Thanks, will order that part and report back.

  • markahlady Aug 22, 2009

    The problem was the display board, part 445414, which has the display plus the most complex circuitry, which is maybe what you meant localwonder, although there is another board with they call the control board, part 489273, which has the relays and some power stuff and less circuitry.

    The oven now works, and when i move that bad display board to another identrical working oven, that oven shows the same problem.

    That board was replaced by Bosch for the previous owner less than a year ago so it doesn't sound very reliable.



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HI. this error code concerns the actual main control board. the logic chip set or, SVL EE Chip is not able to react to the resistance signal that is sent, via RTD(temp sensor). replacing the Main control Board will fix this issue.

The unit is programed to render itself inoperable in this state.(Failed Chip set). In this state, it is unable to properly regulate the heating cycle.

Posted on Jul 15, 2009

  • Michael Masters
    Michael Masters Jul 15, 2009

    Ok, i will monitor the thread for further comments...

  • Michael Masters
    Michael Masters Aug 22, 2009

    Yes you are correct. Bosch has issued numerous recalls within the following months. most are concerning the dishwasher control boards for 2005-2009. There were several touch screen boards that were recalled as well. this concerned the oven line.

    I miss-spoke, as you stated. i was referring to the actual touch pad board. this is a separate section that is linked to the main.



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