Question about Thermador RDDS30 Dual Fuel (Electric and Gas) Kitchen Range

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One of the Burners does not light.

The left rear burner does not work and it is not the electronic igniter as there is spark there. The burner is not getting gas. All the other burners work fine.

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Re: One of the Burners does not light.

I have the same problem and just took the cooktop apart to investigate. I disconnected the solenoid lines from the simmer controller (that is located under a metal guard to the right side under the burners) and checked them with an ohmmeter. It reads an open circuit, which suggest the solenoid is bad. When I turn the control knob on, I also read about 100V DC on the corresponding solenoid terminals of the simmer controller. I was surprised it was that high for a DC voltage, does anyone know if that is correct? I would hate to spend $90 on a replacement solenoid valve and then have it blow because the controller is putting out too much juice.

Posted on Feb 20, 2007

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Re: One of the Burners does not light.

My middle rear XLO burner is not working. You can order a Thermador simmer control kit with 2 XLO potentiometers and the ignition control module for about $200 or individual potentiometers for about $20. You have to take the top off to replace these. The potentiometers fit around the valve stem below the knobs. They probably got liquid in them when you took off the knobs to clean. It may be possible to clean the contacts on the old one. New, improved part is Bosch #422748 potentiometer for most models with XLO burners. Don't mess with the gas lines and solenoids.

Posted on Jun 19, 2009

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Re: One of the Burners does not light.

I have the same problem. Left rear burner, no gas. It is the XLO burner. I think its one of 3 things as mentioned below a) Burner Valve b) Bad gas solenoid or Bad gas controller. Not sure how to get started....Any help would be greatly appreciated.

Posted on Jan 30, 2007

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Re: One of the Burners does not light.

There's really only three things this could be if the spark igniter is working. The burner valve is broken internally and not letting gas through, or the burner cap is not on correctly and so the gas mixture is wrong and won't ignite. Usually the burner top just gets set askew and needs to be righted so the burner can work properly. If in fact there is no gas at all coming out, you will need to replace the burner valve. The third thing it could be is only if you are having this problem on one of the burners has the X-LO feature (turns the flame on and off in simmer mode) it could be a bad gas solenoid, or controller. These X-Lo systems are quite complicated and it may be worth your time to pay a thermadore servicer to check it out if its not a simple fix. Hope this is of some help.

Posted on Dec 21, 2006

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Why would the left burner activate the right igniter?

Sometimes a lot of the holes in the burner get plugged. I use a toothpick to clean them out.
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If the igniter doesn`t work on the front left burner, but does on the rear left burner, the igniter does work. The problem is likely the control knob for the left front burner. The. Control knob includes the electrical switch the activates the igniter when you turn on that burner.

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Burners will not light

Hello bdrillbit - Is the electronic igniter aligned properly? Ensure that tip of spark igniter is aligned with metal point or "nib" located on underside of burner cap after the burner mounting screws have been tightened. (Not all burners having mounting screws). When the burner control knob is set to the "LITE" position do the igniters spark? Can gas be heard or smelled coming from the burners when the control number is turned on? However, if you smell gas, I highly recommend turning the unit and the gas off if you can reach it and contact your gas provider. The range itself does not have a switch or regulator to relight it. Keep in mind that it may be experiencing an issue with the spark module, electrodes, wiring or EOC.

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Thermador over two left burners will not provide gas when knobs are turned. Also the oven will not light and the igniters on all burners will not spark. The electric is good to the appliance oven fan

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I have a Kitchenaid superba gas range slide in, model #KGST307HBS9. The nob of one burner, only, the left rear, will initiate the electronic spark that will light burners. When that nob is turned to...

Pull out the bottom drawer and you will find the spark module. I strongly suspect it is weak. Here is a video that shows operation:
This one shows the module on the backside but I looke dup yours and it is below in the backside of the bottom drawer. Ok here is what i think The igniters could be dirty and I have a video showing how to check that plus another video to show how to remove those pesky switches on the top burners and spark module operation.



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The most common problem for gas surface burners is that they get gas but don't light. This is generally caused by dirt or grease splatters on the burner itself. Residential-grade range/stove burners are round and have small holes around their perimeter to allow gas to flow out and create a round flame. The gas coming from these holes is often ignited by a small vertical row of holes on the side of the burner. If these vertical holes are clogged or obstructed, the gas can't ignite.

The solution is to clean the burners thoroughly. Use a toothpick to clear the small vertical holes, then allow the burner to dry completely and try lighting it again. If it doesn't light immediately, repeat the procedure

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Burner will not ignite.

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If your top burners are not lighting or will not work, it is possible that the burners have become dirty or wet. Please follow the troubleshooting directions below before calling service:
  1. Turn you burner to the Lite position:

    If you hear clicking or sparking, go to Step 2.

    If you do not, check your circuit breakers. If the circuit breaker is ok, we recommend that you schedule service by calling 1-800-432-2737 or schedule service online.

  2. Clean the burner and electrode:

    First remove the burner grate, cap, and head. Use a needle or paper clip to poke through the holes on the burner head. Re-assemble and try the burner.

    Remove the burner grate, cap, and head. Even if it looks clean, wipe the tip of the electrode with a clean, dry paper towel and PRESS IT DOWN. Re-assemble and try the burner, again.

    Check to see if the burner works, If not, then go to Step 3.

  3. Re-assemble - Make sure that each burner top matches its burner bottom. The burner top will lay flat if put on correctly.

    Check to see if the burner works, If not, then go to Step 4.

  4. The spark igniter is operating properly, but the burner is still not lighting. At this point, we would recommend that you schedule service by calling 1-800-432-2737 or schedule service online.

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