Thermador valve 415500 is discontinued. Can I use 415500 which is a simmer valve instead? I could accept the different operation to solve the gas leak.

This is generally due to blocked burner heads due to spills, remove it and clean it thoroughly before going any further.

They may have accidentally turned off a little gas cock which is cunningly hidden on the front panel can\'t remember if it\'s top or bottom, it isolates the gas to the main control valve.

Hello Sharon,
are the two left hand burners "simmer burners" that low come on and go off to simmer a pot?
and the right side just set on and turn off without the simmer option?

if yes this pretty much describes your cooktop the part called the potentiometer is going the be the problem.

I am not affiliated with this site but I was able to find your parts here: http://www.appliancepartspros.com/partsearch.aspx?pn_=415500
Sure hope I was helpful.
Please rate this if when you get a chance.

Hi Iniro
It is true that thermador has permanently discontinued some of its models - alternative supplier have not beeen identified

Regards

Lowly what the potentior does is turn on the burner control system. When you turn on a normal burner you are opening a gas valve and closing a switch to generate a spark. Thus gas flow to the burner and spark. On the extra low simmer burner there is a electric solenoid between the burner head and the gas valve. this has to open as well for gas to flow. What the potentior does is signal the simmer control what level of flame you are requesting and telling the spark module to generate a spark. Once you go to the exlow setting the potentior tells the simmer control what level of heat and will cycle the flame on and off. So when the burner knob was between low and extra low, the flame would cycle on and off. You have to seperate the top section of the cooktop from the burner box to change the potentior for it sits on top of the gas valve for that burner.

lowly is it the left burners that won't lite? I only ask as depending on the model some of the Thermador cook tops had simmer control burners. This is a 3 part system on the burners. 1 a simmer control, 2 electric solenoid, 3 potentiors. When you turn on the burner the potentior tells the simmer control to send power to the gas solenoid. At the same time the unit will spark. If your unit has extra low on the left 2 burners then you have this system. The usual problem in the potentior. Hope this helps.

take the knob off, and take a very small flat screw driver, and inside the valve, turn it to the left, go slow, and you'll see that it goes down, there ya go

Either the potentiors or the simmer control.

Take apart the cooktop and it is the potentior on the valve for the simmer burner that is usually the issue.