I had an amazing appliance repair man who gave me maintenance tips. He explained that the venturi tube and its holder are two different metals, which is why they will corrode, eventually seize, and the holder will shear when a lot of force is used. He told me that to prevent the corrosion I would need to take out all of the venturi tubes once a year, clean them, and then put VersaChem Anti-Seize Thread Lubricant type 13 Hi-Temp Copper Formula on the threads on each before re-installing them. I have been doing this on the same range for almost 25 years! The burner we use the most is sometimes a bit dry and slightly stiff, so I actually do it every six months. Hopefully someone else can recommend something to use when a tube is corroded, but not completely seized. Maybe liquid wrench? I don't know. I am still grateful for this tip and post it whenever I see a discussion about the problem.. Pay it forward!😁
Great video! I serviced these for years and there are MANY models/revisions, sometimes ALL SIX venturies were seized up, cleaning agents have an adverse effect, so messy, greasy ones actually cone right out!... I use a step bit and drill straight down destroying the brass venturi and then just replace the broken parts. The orifice is different simply because one is Natural Gas (most common), the other smaller orifice is Liquid Propane... That's why you had to change it over.
Thanks for posting this. Have nearly the same model and about to repair and your video will help allow to me avoid some pitfalls! I also was told to add copper anti-seize to the new venturi tubes to help with future issues.
Jim, thank you for this nice video. About 10 years ago I had to get into my Thermador stovetop and faced the exact same problem (venturi tubes stuck/welded in place) and I fixed my issue by working with the cover still on (very awkward). Anyway, stuck venturi tubes seem to be a very common problem. Your video provides clear insights into the problem and some logical steps to solve them. Thank you again!
Thanks Jim! This is great intel! My 48” Thermador dual fuel range is 16 years and things are breaking. The burner I use the most is frozen and spinning. Will find a week this spring to tackle the ignition issues and control board so I can use my grill if it takes me weeks!
Your video gave me the confidence to open up my stove and fix the ignitor. My venturi tube was stuck, so I figured I would need a new venturi tube, jet holder, ignitor and ring. You used a jig saw to cut the venturi tube. Another video suggested a variable size drill bit. I chose the milwaukee from home depot. It was expensive, but I was able to cut open the venturi tube very quickly. Since I planned on replacing the jet holder, I didn’t have to be too careful. The whole repair only took about one hour, but it did take planning ahead of time.
Great video. My Thermador has been just okay and not the “professional” range or oven it fanes to be. A knob fell off with a brush of a kitchen towel at the shaft and the replacement part was super expensive for what you get. Getting to it required a massive disassembly since Thermador did not build it with the intent to allow repairs. For an $9000+ appliance it has been disappointing.
THANK YOU !!!! We have the same problem and no where in all our Thermador manuals etc. could we find how to fix this problem nor how to even take the stove apart to repair. Our stove is 13 years old and hopefully we can take ours apart a bit easier wish us luck!
Hi Jim - excellent video - I have an ignitor that just keeps clicking on so it's probably bad - can you tell me where to shutoff the gas to the cooktop - my LP line in the basement is off a manifold and the only line that does not have a shutoff valve on it is the Cooktop - figures!! Would appreciate any help since I don't even want to start disassembly until I can figure out how to turn off the LP gas line at the cooktop
Firstly, thank you. Well produced video. Do you happen to have a listing where you can buy the igniter which has a metal ring around the top? I’m having trouble finding any that include the ring.
Wow, thanks for this! I need to replace a burner, because one of the “fingers” has somehow drooped down towards the splash shield and away from the burner cap. The result is the cap doesn’t sit level so the gas doesn’t flow past the igniter as it should. Your video gives me pause a little, especially because it seems the venturi tubes have gone out of production - so big trouble if I break one :-/ Your vid is super-helpful though, letting us know what to expect. Thanks!
How do you get the jet holder out of a PRSE366S when the brass nut is frozen on. I have destroyed the century tube, but I cannot remove the nut that holds the jet holder up. I have bought extra parts, so I am prepared to destroy old parts. Thanks, great video!
We have a Thermador model # SGCS365RS. One simmer burner was not igniting; and I consider myself blessed by not having an explosion. I used liquid wrench and other penetrating fluids as well as torch heating, and the rear, center Venturi never loosened. I easily removed the other 4 Venturis, & was able to lift the front of the cooktop high enough to replace the pot for the non-working simmer burner. With vice grips, I rocked (as advised) the center rear Venturi until it rotated, but it never backed out. It never dawned on me that the gas line to this burner may have broken off while I was rocking the Venturi back & forth attempting to back it out. After replacing the front center simmer pot, I turned on gas and electricity & (even with the replaced front center simmer pot) noticed that now, neither of the two simmer burners would ignite. (Fortunately no explosion) After viewing another U-tube showing someone drilling out a similar Venturi on another cooktop, I used a dremel tool to cut off the brass flange so that i could raise the cooktop over the cut Venturi. At this point, I realized that the aluminum gas line was broken at the brass connection to the Venturi frame. With the Venturi frame in a vice, & vice grips clamped to the Venturi brass & a torch, I have still not been able to unscrew the Venturi.
@Jim, Trying to figure out how to get the pans out that the burners sit in. I have the 6 burner stove & over with no grill or griddle to remove for access underneath. Open to any suggestions as the pans the burners sit on seem anchored down but the Venturi Tubes seem like the only "screw" I can see that might be holding the pan down. Please advise.
I had a number of questions about where I was able to find the replacement parts. Here you go: - Ignitor www.amazon.com/gp/product/B072N6FMQT/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 - Venturi Tube www.appliancepartspros.com/bosch-venturi-tube-189023-ap2825260.html - Jet Holder www.appliancepartspros.com/bosch-jet-holder-15000-188976-ap2825232.html
We have a Thermador model # SGCS365RS. One simmer burner was not igniting; and I consider myself blessed by not having an explosion. I used liquid wrench and other penetrating fluids as well as torch heating, and the rear, center Venturi never loosened. I easily removed the other 4 Venturis, & was able to lift the front of the cooktop high enough to replace the pot for the non-working simmer burner. With vice grips, I rocked (as advised) the center rear Venturi until it rotated, but it never backed out. It never dawned on me that the gas line to this burner may have broken off while I was rocking the Venturi back & forth attempting to back it out. After replacing the front center simmer pot, I turned on gas and electricity & (even with the replaced front center simmer pot) noticed that now, neither of the two simmer burners would ignite. (Fortunately no explosion) After viewing another U-tube showing someone drilling out a similar Venturi on another cooktop, I used a dremel tool to cut off the brass flange so that i could raise the cooktop over the cut Venturi. At this point, I realized that the aluminum gas line was broken at the brass connection to the Venturi frame. With the Venturi frame in a vice, & vice grips clamped to the Venturi brass & a torch, I have still not been able to unscrew the Venturi.
