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Customer Questions and Answers for Cooktop Spark Module by Bosch

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Manufacturer Part
4.89 (64)
By: Bosch
Part Number: OEM17998509
Manufacturer Part Number: 00636439

Gas burners won't ignite or spark continuously? This spark module generates the high-voltage spark needed to light burners. DIY repair in 30-60 minutes.

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Questions & Answers

For Bosch Cooktop Spark Module (Part Number: OEM17998509)

1 Answer

Dave, the most likely failure would be in the switch 00428049, which can be tested for continuity to ensure that it is able to open and close properly. If it opens and closes properly, then the failure would be in the ignition device 00636439.

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Robert S. for Model Number GGNCV30

While I was using the stove last week, my cooktop started sparking all the time. I had to unplug the power. I checked all 4 burner microswitches, and one checked out bad. I ordered a replacement from you, installed it, and the nonstop sparking continued. I checked all the switches again, and they are working (Normally open, closed when gas valve knob is turned to on). Ordered and replaced spark module from you. The new one is for 4, 5, or 6 burners. I connected it exactly as instructed (for 4 burners only). Now, the continuous sparking has stopped, but when any burner is ignited, the sparking doesn't stop. What else could be wrong? One of my ceramic "spark towers" has never been replaced, and it is a bit loose. I tried disconnecting that unit completely, but it had no effect on the problem.

1 Answer

Hello Robert, The issue of the ignitors continuing to spark after the burner is lit is quite common and normally does not require any parts to repair. First I will explain how the unit is designed to operate since it is necessary to understand how it works to fully understand why it acts this way when not operating properly. For safety reasons the unit is designed to spark all ignitors at the same time in case something were to be miswired and one of the surface burners are turned on and gas is coming in but the spark is too far away for ignition to occur because the spark is occurring on another surface burner, creating an explosion danger. Since all burners are designed to spark at the same time, this eliminates the possibility of a gas accumulation in the room that the spark can ignite if miswired. Next, the spark module is actually sensing the very low resistance of the flame and turns off the sparking when the flame is present. If the flame goes out, the spark module senses the larger resistance of the absence of the flame and will try to restart the flame by sparking all surface burner ignitors again. If a spill occurs or an increase in resistance between the metal pieces of the cooktop from normal corrosion, the resistance is increased enough that the spark module cannot sense the small resistance of the flame and will spark all of the ignitors. Technicians refer to this as "dropping ground" for the surface burners. Correction of the issue includes disassembly of the cooktop and cleaning, (best with sandpaper), between the connection points of the metal parts of the cooktop so when the screws are reinserted, electrical continuity is re-established between the chassis and all of the parts connected in turn to it. This is so chassis ground will be electrically provided to the burner base for the spark module to sense the presence of the flame and it will eliminate the sparking.

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1 Answer

Hello Howard. The manufacture does not offer this information. The wiring diagram should be located somewhere on the unit. Thanks.

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