Samsung gas oven upper chamber will not maintain temperature

[tomusn83]

I have a Samsung gas dual oven Model: NX58M6850SS/AA. The upper chamber preheats fine but will not stay heated. For example, I preheat to 400, then after 15 minutes it's down to 325. The igniter glows for about 10 seconds then goes out without a light off. It repeats this cycle as the temperature goes down. If I turn it off, then turn on the broiler, it flames up right away. That indicates the igniter and safety valve are working correctly from what I've read already. I have replaced the upper chamber temperature sensor and the control board but the problem persists.

Thanks,
Tom

[vee8power]

Check the Amp draw of the ignitor.  It should be at least 3.3 amps. If not change the ignitor. 

[Vance R]

+1 for amperage draw, it is probably marginal. Samsung seem to be sensitive to igniters getting weak.

[Terry Carmen]

> The igniter glows for about 10 seconds then goes out without a light off.

Check the voltage across the ignitor to see if it's still powered up when it goes out.

They sometimes develop cracks that only open up when hot.