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  • Keeping temperature problem

    Posted by Jose A on May 10, 2024 at 9:17 pm

    Hello guys. The oven works well just sometimes does not hold the temperature. What could be the problem? My first try is to change the relay. Help please 🙏

    fixbear replied 1 month ago 2 Members · 3 Replies
  • 3 Replies
  • fixbear

    May 10, 2024 at 9:58 pm

    First, could you tell us the make and model?

    It will come down to either the call for heat, or the burner not lighting.

    The call for heat will be the temp control system. Or the blower motor safety, or the door switch.

    Burner not lighting will be a ignition problem.

    You can determine it with a voltmeter on the ignition control supply in conjunction with a digital thermometer probe in the box. Power but no heat it will be the burner/gas. No power when it should be calling for heat will be in temp control circuit. I would have to have more to find the schematic to tell you more. But the most common is the door switch or safety switch in the blower motor. However, it can be back farther in the temp control. Mechanical or digital thermostat? That requires a bit more info from you.

    • Jose A

      May 11, 2024 at 9:58 am

      Thanks 🙏 for your help. It is a convection oven, Garland SUMG-GS-10ESS. The machine works fine. The flame, ignition & it reaches temperature & keeps temperature. Just some times (not always) it does not restart to maintain temperature. Someone told me that is a problem with the Relay. What do you think?

      IMG 8515
      • fixbear

        May 11, 2024 at 7:09 pm

        It’s not likely a relay as they tend to just fail completely. If you’re sure that the cook and hold function is not causing it. I’d be looking at the centrifugal switch in the motor. Or possibly heat saturation to the control board. Check to make sure the muffin fan is running at speed for cooling. Again a DVOM is the tool of choice here to find the actual problem. Being intermittent, it may take a bit. But just replacing parts willy nilly gets very expensive.

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