I have model # Gas Stove PRSG304S Thermador. I've changed the potentometers as I have done in the past which always corrected the problem. This time I've changed potentometer and spark ignitor and haven't fixed the problem. I see that there is a simmer control unit that appears in the diagram for this unit, but is not on my unit. Is this a part that is now an add on?? I see that the wires coming off the spark ignitor go to a terminal block. Has there been another update I don't know about to put a simmer control in? Is there another fix I'm missing?

Chuck

I received the kit to repair left hand burners XLO for Thermador gas range PRSG304S. This was a two month ongoing project that I simply refused to give up on. The information available to me left me with the understanding that I needed to add a simmer control module to the system. I understood it was not in my system, however, after looking for this control I believed I needed to add this module to the wiring. Low and behold after puling off the lower front panel at floor level there it was--the simmer module. This was shown on all diagrams at the upper location. After speaking with you, and your answer that it was only a 10 minute repair, it renewed my curiosity and I removed the lower panel. The repair was rated 2 *'s for difficulty. I give it a 1 for difficulty. It was that easy to switch out the wires and change the 2 pots. I NOW HAVE A WORKING UNIT!




After reading so much information on many repair sites, there was never any indication of a different location for this module. My only fault with Thermador was the lack of customer service. This was an easy fix, and one that could have been explained simply.



I was in the process of buying as unit from another company, which was money I really didn't have at the moment. You have restored my faith in THermador



Thanks again,

Chuck






THIS is a letter to Thermador thanking them for their help !!

Thoughts,

I had the same problem with the gas venture tube in the burner, they were corroided and would not move. I was able to grind off 2 tabs in the back of the stove with a thin wheeled grinder. The burner assembly then lifts out. There are 2 in the front that do not need to be ground out. On replacing the burner assembly the burner then sites back on a ledge, no need for the tabs. After removing the tabs, reach in through center opening and remove 2 gas lines to burners. There is a double sided tape that holds it in place, which you can put back on, but it does not need it. On my stove I was able to reach in through the center between left hand and right hand burners, which is a removable panel which lifts out. (it's about 4" wide) I used a stubby screw driver to remove the sheet metal that covers spark ignitor. The wire on the spark ignitor was long enough to disconnect the wire harness and replaced with new one which is a 6 point gas reignitor. This can be used on a 4, 5 or 6 burner stove which runs about $90. Good luck with your install.
Chuck