Question about Ovens

2 Answers

Thermador SCD302TB wont heat. first upper, now neither

I purchased a thermador SCD302TB double wall oven from a dealer out east and installed it myself. It has been great until about Nov. ' 07 when the top oven quit heating. I took the front panel off and checked the temp. high limit switch, not tripped. Even tried bypassing it. Nothing. The control panel... has always worked fine. No dimming or error codes EVER ! blowers come on and everything seems to be functioning as it always did, but NO HEAT, not broiler, convection or bake elements! We have just been getting by with the lower oven , But today IT decided to do the same thing. I've tested all the elements, they seem to be good. The only odd thing is that there is something that clicks behind the control panel as we try to heat up the oven. sounds like a relay or something. It will click as though it is going to start to heat, and then click a second or so later as if it cycled off again. Does this approx. every 30 seconds. Ive held the element to see if I can feel the slightest change as it clicks,I Don't seem to. Any ideas? the town I live in has no Thermador qualified tech , and I'm not sure how close the nearest one might be. I'll start looking if you think that may be my only option. THANKS!! Eric

Posted by on

  • 2 more comments 
  • Eric in IA Apr 01, 2008

    I finally found the part number and was able to get a controller board for the oven. Replaced it and VOILA. The same response! The elements test out OK and I checked the leads to the elements with a volt meter. Don't get any voltage at all. So I thought perhaps the temp. Probes were messed up telling the oven that it was already hot. But they read 100 degrees on the display and if I heat the probes up the display does go up, so I presume it's nothing that simple. Any other Ideas??? The closest repair guy is 90 miles away and WILL come look at it but told me it would likely take 2 trips (one to diagnose and another to return with the parts and fix it. BUT he charges $1.00 a mile just to come out . I'm looking at 360 bucks just for mileage. I was really hoping to avoid that. Should have bought an Amana I guess!!
    -ERIC

  • Eric in IA Apr 01, 2008

    around 20 to25 ohms. But Ive put a volt meter to the wires that clip to the elements and turned on the oven and they show zero volts no matter what I set the oven at. I checked one of the bake elements and one of the convection elements (the easiest ones to get at) and both show the same results zero volts no matter what I do.

  • Eric in IA Apr 04, 2008

    looks like they run through various points on their route. on the schematic it mentions "air switches" U/O and L/O . On the 16 page parts list I had them send me it mentions "sail switches" which I presume are the same things. Through my research I have found these "sail" switches to look as though they require a certain amount of airflow to allow current through. Could it be that these are the culprits since the ovens quit at different times, and the lower oven did not get much use until after the top one quit. Seems possible! I don't have an exploded view of this area of the oven, The parts list shows it as being in the bottom portion of the oven but I don't see anything down there that looks like the switches. Does anyone have a clue where they might be found? seems I may have to remove the whole thing from the wall. Any ideas would be greatly appreciated!! Thanks!! -ERIC

  • Eric in IA Apr 10, 2008

    I haven't had a chance to look for the switches yet. No time and no help to pull the oven out of the wall. I am hoping to do that tomorrow. I am supposed to have the day off. I think I'll have to build a platform of some sort to slide the oven out onto. I'll let you know what I find as soon as I get to it. My wife is getting tired of the toaster oven!! THANKS!!
    -ERIC

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,226 Answers

Hello
in addtion to robotek solution but this is not actually a solution.
Eric in IA i suggest you to contact the vendor of your stuff a iam sure they can provide you a solution.

melnavz

Posted on Apr 01, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

If it is any help to you, you can get a new controller board complete on ebay for aroung $190. Not much left after that besides elements...

Posted on Mar 01, 2008

  • 4 more comments 
  • Graeme Ross
    Graeme Ross Mar 01, 2008

    I am trying to locate some schematics for the oven, to guide you through a diagnostic session.

  • Graeme Ross
    Graeme Ross Mar 01, 2008

    Just a thought, you say that the elements look ok. What resistance do they measure? You can also get new elements from the same parts guy on line

  • Graeme Ross
    Graeme Ross Apr 01, 2008

    Hi, hhmmm, so you got some spares for your oven, they will sell on ebay if you dont decide to keep them. You say that you have checked the elements. What did you measure them out at?

    regards
    Graeme

  • Graeme Ross
    Graeme Ross Apr 02, 2008

    ok, an where do the wires from the elements end up? Do they go straight to the controller or to another relay/junction point. If they disappear into the lining of the oven, you can "meter" them out with your ohms meter to see where they end up.

  • Graeme Ross
    Graeme Ross Apr 04, 2008

    Check that they are actually switching or changing state when the fans are operating, they will detect airflow from the circulation fan. If the fan stops, then the heating element needs to be switched off. The sail switches probably feedback to the controller, and then in turn operate a relay that turns power on and off to the elements. You need to locate where these relays are, and do some tests to see if they have power supply to them and/or are actually switching power to the elements. It is likely that this is what is causing the problem.
    You may need to remove the oven to get a better idea the setup. Just be careful... there is alot of power available at an oven connection. Sometimes 3 phase. LETHAL need I say more.

  • Graeme Ross
    Graeme Ross Apr 08, 2008

    Any luck with your oven?:)

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Thermador Built in oven scd302 not heating upper oven, lower oven fine. Heating element not glowing red as the oven below it does.


Hi.

Problem is usually either temperature probe or heating element.

Grab a multimeter and set it on impedance (Ohms).
Remove first temperature probe and then heating element.
If either probe or element is reading open (ohms infinity), then replace the part.

If both probe and elements are not open, then the problem is either wiring or oven electronic control. The most common fault resulting in no heat is the temperature sensor located inside the oven cavity.

Regards.

Ginko

May 31, 2011 | Thermador SECD302BPSS Electric Double Oven

1 Answer

I am getting an F64 on my thermador electric double wall oven after a few minutes of preheating my upper oven, and the oven turns off. What des this mean?


Hi, i found out from Thermador customer service that error code F64 means that the lower fan switch (located inside the bottom trim on the right side) is not being detected as closed. In my case, this was because the header (P4) on the Display panel had broken loose from the PC board and was no longer making contact. P4 is where the lower fan switch wires connect to the control boards (actually the display panel).

Jan 05, 2011 | Thermador SEC302 Electric Double Oven

1 Answer

Heating element in upper oven heats to about 300 degrees and temperature will not increase.


That seems to me like it could be an issue with the sensor. Ohm it out. It should be around 1100 ohms if it is any good. Check for shorts from each wire of the oven sensor to ground. I have a manual and a TIP I wrote about these Thermadors.
Thermador 301/302 wall oven repair manual

Sep 28, 2010 | Thermador SC302T Electric Double Oven

1 Answer

Thermador SCD302 NO Illumination on Display window


Bullet fuse to control panel Melted due to excessive heat from self clean mode. Just a guess> Typical fuse:49b75ce.jpg
I have a manual around here somewhere Oh yeah in my TIP

Thermador 301/302 wall oven repair manualHelpful?
c2a18ea.gif

Sep 27, 2010 | Thermador SC302T Electric Double Oven

1 Answer

Thermador wall oven doesnt heat up after being self cleaned


This may be the thermal fuse mounted on the back panel or you may have a failed control. We rebuild Thermador control boards at www.fixyourboard.com

Jun 02, 2010 | Thermador C302U Electric Double Oven

1 Answer

Heating element on upper oven of a wall Thermador Oven


The control switch may be bad on it. If there are 2 elements on the top, they both are not bad at the same time.Check to see if the wires have not burned off the control switch first. Check to see if your breakers are O.K. Turn them both(maybe 3) off and then reset.

Jan 30, 2009 | Thermador Ovens

1 Answer

THERMADORE DOUBLE OVEN NEW OLD STOCK


Thermador SCD302 upper oven preheat does not work; the heat temperature goes up very slow.

Sep 03, 2008 | Thermador SC302T Electric Double Oven

Not finding what you are looking for?
Ovens Logo

Related Topics:

137 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ovens Experts

William Miller
William Miller

Level 3 Expert

8820 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Mike Cairns
Mike Cairns

Level 3 Expert

3053 Answers

Are you an Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...