How to Troubleshoot & Replace Bosch AP2832927 / 00415498 Jet Holder W/Jet

I converted a natural gas Thermador range to LP. IN order to do this the jets had to be changed over to the LP size. Since the two parts were welded I had to cut the venturi tube nut off. To do so I used a step drill bit (up to 3/4" diameter) and cut through the top of the venturi tube from the inside out. Once the tube's top was cut through the venturi and jet holder assembly was easily removed by disconnecting the gas-line. With the assembly out a new jet was installed and the unit re-installed in a matter of a few moments. Thanks for the quick shipping the repairs were done and ready for installation in short order. The price for the parts was reasonable, the shipping fees were great and the quality top-notch. 

Had two different repair companies come in to repair my Thermador PRG304US Range. Both explained the the "broken" parts were no longer available making the repair impossible and thus I would have to buy a new range. Ok, but before I shell out $5K to replace the one I had, I needed to answer the questions I had. After twenty minutes of online research and the help of AppliancePros I was able to repair my own range. The techs obviously mis-diagnosed the problem, and not only that the one guy "pretended" that he attempted a repair that he never did. Repair was not overly difficult for someone with a little "handyman" skill and common sense, but was time consuming. Had to remove multiple parts for proper exposure to allow replacement of solenoid. The Venturi Tubes were frozen also adding to the difficulty and time required. DIY repair videos that greatly helped me with the repair: https://www.youtube.com/watch?v=p5O7UV_aQjw https://www.youtube.com/watch?v=g8_rUV0wFyM 

The biggest problem is taking apart the cooktop venturi/burner assembly. They were fused after 20 years of use. These have to come out to get to the electric gas solenoid which I thought was not opening to let gas to the burner. I ruined the two Ventura’s and jet holder and the two gas lines getting them out and replaced them with new from appliance parts pros. Before I destroyed the old parts I figured out that it wasn’t the solenoid that was bad but I wanted to be able to see how everything looked underneath in case I needed to get to them in the future. First I made sure that the parts I was going to destroy were in stock and they were so I used penetrating oil a 20 mm flat bottom socket and then a unit to drill the hex head off when the wrenches couldn’t loosen the venturi and started spinning the jet holder around breaking the attached gas tubing. I used 1/4” copper line from an ice maker to make new lines and put everything back together with anti-seize. The problem was the potentiometer. How I found out have I just switched the one that was working with the one that wasn’t and that was it. Appliance parts pros had all the parts in stock and shipped out to me in a few days and then it took me about a half-hour to put everything back to new condition. Works perfect for $105.00 thanks. 

On dissasembly the venturi was fused into the jet holder which caused the whole assembly to spin and ruined (spun) the burner supply tube in the process. Apparently not uncommon as the Appliance Parts Pros website popped up all of the parts I needed. Started as a junior nightmare and ended painlessly. 

Replaced both ignitors. Since I was working on the range I also overhauled the final 2 of the 6 burners on the stove top. Venturi tube and jet nuts were frozen and could not remove drip tray for cleaning and access to ignitor clip. Had to drill out Venturi tubes using a tapered bore bit. Used Dremmel with cutting wheel to remove jet nut. This range has been heavily used since new for 16 years. Works like new, again. 

The root cause of the problem was a bad potentiometer. The carbon tracks were worn out, and not providing electrical contact that energizes the gas control solenoid. In order to test the solenoid, I had to disassemble the cooktop, and the nut and "jet holder" were welded together from years of exposure to heat. Disassembling the old parts was difficult, but installing the new ones was easy. Note that the new potentiometer (AP3782975) appears to be a direct replacement for the old one (AP2825521). Thermador PRG304US 

I had to cut out the venturi with one of those vibrating tools with a narrow metal blade like a hack saw. Takes time and wear your ear plugs . I had two different repair guys here they both said I need a new range . It's 15 years old and 9 grand to replace it. No No . I'll fix it and I did . 

I repaired it with new original replacement parts. Luckily they were still available. The only challenging part was the removal of the ventures from the holder which were seized solid and required to grid the top portion of them. Then I could access the solenoids which needed to be replaced to make the burners to function. 

Needed some parts to complete a Nat Gas to Propane conversion on an older Thermador range. Known issue with frozen bosch venturi tubes. Had to cut out the old ones and replace the orifice holders, venturi and the tubes that I messed up. 

Had to take out two burner top and plates.