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Thermador Range Burners- no gas, no spark
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Model: PRG364GD Brand: Thermador Age: 5 - 10 years
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stevehanna  
#1 Posted : Monday, August 27, 2012 10:25:04 AM(UTC)
stevehanna

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I have a Thermador Rangetop (PRG364GD). We had issues with irratic sparking over some time. Then all sparking stoped. Now the big issues- the rear simmer burner stopped producing gas. Trying to figure out if this is an issue with the potentiometer, the simmer control, or the spark ignighter or all of them? help please.
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Simon / APP Team  
#2 Posted : Monday, August 27, 2012 4:26:35 PM(UTC)
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HI.

Does it spark when you turn it on?
What is the serial number?

Simon.
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stevehanna  
#3 Posted : Monday, August 27, 2012 4:29:11 PM(UTC)
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No. No sparking on any burners. Not sure the SN#. Where do I find the SN tag?

I did confirm that both of the XLO burner solenoids are working by swapping the wires. I have not confirmed the potentiometers are good yet...
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Gene  
#4 Posted : Tuesday, August 28, 2012 12:53:09 PM(UTC)
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Perform the troubleshooting as described in the attached file. Post the results.

Gene.
File Attachment(s):
XLO burners troubleshooting.doc (267kb) downloaded 493 time(s).
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stevehanna  
#5 Posted : Tuesday, August 28, 2012 1:10:37 PM(UTC)
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Should I be measuring between the contact on the Simmer controller? Or between the contact on the molex connect that goes to it?
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Gene  
#6 Posted : Tuesday, August 28, 2012 1:13:08 PM(UTC)
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It says in the instructions "at the simmer control".

Gene.
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stevehanna  
#7 Posted : Tuesday, August 28, 2012 1:56:36 PM(UTC)
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Ok

on the Spark Module
SW1-N: 0VAC
SW2-N: OVAC
A to N: Couldn't find A?

So on to Simmer Controller
POT2 to Line5: 0 VDC, negligible
POT1 to Line5: 0 VDC, negligible
Line5 to Line: 0.838VDC

So this suggests that I need to replace the Simmer Controller only.
Can you recommend a Part for that? I looked thru and didn't see one that looked like what I have? Also, If I do this will I have to replace the potentiometers also?

Thanks

Steve
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Gene  
#8 Posted : Tuesday, August 28, 2012 3:08:09 PM(UTC)
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Originally Posted by: stevehanna Go to Quoted Post

on the Spark Module
SW1-N: 0VAC
SW2-N: OVAC
A to N: Couldn't find A?

So on to Simmer Controller
POT2 to Line5: 0 VDC, negligible
POT1 to Line5: 0 VDC, negligible
Line5 to Line: 0.838VDC

So this suggests that I need to replace the Simmer Controller only.
Can you recommend a Part for that? I looked thru and didn't see one that looked like what I have? Also, If I do this will I have to replace the potentiometers also?


"A" is marked on the label on the side of the spark module as well as SW. You had to turn the 2 non XLO burners On prior to this test. Did you?

Did you follow the flowchart instructions step by step?


You said:
Quote:
...Then all sparking stopped...


Did you mean all burners - XLO and regular burners?

Gene.
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stevehanna  
#9 Posted : Tuesday, August 28, 2012 3:53:34 PM(UTC)
stevehanna

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I turned off the gas at the line, but both burners were indeed on during this test.

When I said all sparking stopped- It was irratic for some time. Now none (XLO or standard) of the 4 burners will spark to ignite. Lighting them by hand.
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stevehanna  
#10 Posted : Wednesday, August 29, 2012 12:42:06 PM(UTC)
stevehanna

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I followed the flow chart to the extent possible.
1. With Seq burners on Hi, I got the results reported above. I could not test A to N, as there is no A on my spark module- see attached photos.

Since all voltages were zero- moved on

Check voltage on Seq channel 1 and 2 to SW? I don't know what Seq Channel 1 is??? Help with this. So I skipped this step.

Next Step: Measure POT1, and POT2 to Line 5. Both measured zero. Line 5 to Line- measured 0.838VDC.

So what next?
I have attached photos of the spark module and simmer controller.
stevehanna attached the following image(s):
Simmer Control.JPG
Spark Module.JPG
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