The ignitor keeps sparking and won't stop.Do not

First of all, the model number is under the cooktop bottom, and secondly, this can happen due to the burner switches got wet somehow. Best thing to do is to unplug unit for 6-12 hours, allow to dry, then re-plug unit back in, this should be enough time to dry out the burner switches.
Good luck

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I refurbish used gas cooktop and this can be a common problem.
depending on what king of Spark module you have, it can be different problems. Bosch, most likely has a flame sensor on the spark module.
However, on All Spark Module with out flame sensor,
( has only same number of wires, going to burner, and power in +, and Neutral line, and Ground coming from the Spark module, the ones with flame sensor, has extra 4 to 6 lines coming out of spark module, depending on number of burners). Units With out Flame sensor, it is the switch under the knob that is the cause for the constant sparking or when one particular knob/ burner dose not spark. (how the switch works is it completes a circuit when you turn to "light" and re opens when you turn further to lower the flame.) Either situation, if you are handy, you can Fix the problem your self.
If you are handy and have a d drill and screw driver.
1. un plug unit
2. open unit, ( you tube)
3 find the corresponding switch for the burner.
4. test switch by changing with another working one on unit.
5. once you find the bad switch, you can order new part.
5b. or possibly recondition the old switch, by drilling open, if there are brass rivets holding together,
5c . clean all moistures, and then scrape the contact points of the copper pieces in side o patina build up.
5d. put back and test to see the contact points will work when you turn the wheel, then crazy glue together.
6 put back and test the switch , if all works, put everything back together.

BBB
for units with flame sensors.
the reason why it keeps on clicking, is that the spark module is not sensing the flame, and this can be few reasons.
1. food or rust build up on the ignitor, ( on the burner)
2. the wire to and from the spark module has a contact to the body of the gas cooktop and not enough electricity is getting back to the Spark module.
3. The Spark module is not sensing the electricity through the flame for some reason, The Spark module is starting to go bad in side. ( check all other causes first, module is $100 for part and + labor.

other points,
1. Check for cracks on the ignitor and where it sparks too.
2. make sure the burner and corresponding wires are correct