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Mike DeAngelis  
#1 Posted : Wednesday, June 20, 2012 9:03:35 AM(UTC)
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Mike DeAngelis

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I am having low temperature problems in the upper oven of a Thermador SC302ZS. No error codes. I would like a service manual for this oven or if that is not available a way to check the temperature sensor. I already know that there is no voltage to the heating element when the oven is under temperature.
Thanks...Mike
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Gene  
#2 Posted : Wednesday, June 20, 2012 3:56:20 PM(UTC)
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Gene

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Hi Mike,

You can check the oven sensor by measuring it's resistance. The normal reading is about 1080 Ohms at the room temperature.

- The oven sensor kit Part number: 414152
Part number: 414152



Gene.
Mike DeAngelis  
#3 Posted : Thursday, June 21, 2012 6:21:55 AM(UTC)
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Mike DeAngelis

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Gene,
Thanks for the information on the temperature sensor. I would still like to get a service manual for this oven if that is possible.
Thanks...Mike
Gene  
#4 Posted : Thursday, June 21, 2012 11:53:00 AM(UTC)
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Gene

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Hi Mike,

Unfortunately, I'm not able to do it.

Gene.
Mike DeAngelis  
#5 Posted : Friday, June 22, 2012 1:08:04 PM(UTC)
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Mike DeAngelis

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Gene, Ok, so no service manual. The resistance of the temperature sensor is as you posted and it matches the one in the lower oven. Is there anything else I can check? The upper oven now does not get above 175 and there seems to be a lot more relay clicking during the preheat cycle than in the lower oven.
Thanks...Mike
Gene  
#6 Posted : Friday, June 22, 2012 3:43:12 PM(UTC)
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Gene

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Hi Mike,

Did the bake heating element get red?

If it did, then the problem is a bad relay board. Thermador does not sell it separate anymore. It comes as a part of the oven display kit.

- The oven display kit (double oven) Part number: 702451
Part number: 702451

Gene.
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