[Mike DeAngelis]

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

[Gene]

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

Gene.

[Mike DeAngelis]

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]

Hi Mike,

Unfortunately, I'm not able to do it.

Gene.

[Mike DeAngelis]

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]

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

Gene.