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  • South Bend oven

    Posted by daleydouble on January 23, 2023 at 4:47 pm

    I have a south bend double oven. It will light and get to temp but, won’t relight to hold temp. Replaced temp probe and flame sensor. Model #SLGS-22SC

    fixbear replied 1 year, 2 months ago 3 Members · 4 Replies
  • 4 Replies
  • fixbear

    Member
    January 23, 2023 at 5:23 pm

    Two things I can think of, one relates to heat saturation, the other the igniter amp draw.

    The fan motor has a proofing switch in it. Check that it has continuity to the ignition module.

    With Hot surface ignitions, they monitor the HSI current. It starts at one amperage when cold and then drops amps as it gets hot. If the igniter is old, it may be out of spec even it it still gets hot. Other than that, make sure to use your DVOM to test what is going on. Especially the burner ground to the module. Again, heat expansion may be causing a intermittent loss of conductivity.

  • fixbear

    Member
    January 23, 2023 at 5:26 pm

    Make sure before removing power from the oven when it doesn’t light to check the ignition module for flashing red lights. Normal is green. Should be the codes on the face of the module

  • Hotside

    Member
    January 25, 2023 at 5:37 pm

    I have experienced a wide range of various problems with this hot surface ignition on slgs models. Everything from and intermittent bad connection at the molex plug. That was real fun trying to figure that one out. To flue draft issues. Two problems occurring simultaneously and intermittently and depending on the age a flame spreader that the newer ones have and the older do not. You can get this spreader from S/B and add it on. If the flame does not carry over to the flame sensor quickly enough it can lock out. Poor draft will exacerbate this as well as improper gas pressure. With this one you really have to pay attention to what is going on and troubleshoot accordingly. Sometimes it’s a quick fix, bad ignitor, bad module, or flame sensor, more often than not it’s not that easy. One thing I do know from decades of experience is never troubleshoot by just changing parts which is what may be happening here. If you or your tech put a part in, in error, always remove it when the real cause is found. You will keep your customers and your reputation. Happy troubleshooting!

    • fixbear

      Member
      January 27, 2023 at 11:28 am

      Nicely said Hotside. I totally agree. South Bends have always had a need to understand their differences to others.

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