If one burner on your Kenmore 790.72903013 range is always sparking, regardless of which burner you turn on, there are several possible causes:

1. Burner switch: The burner switch controls the flow of electricity to the burner. If it is faulty, it may be sending electrical current to the wrong burner, causing it to spark.
2. Wiring: Damaged or loose wiring can also cause a burner to spark.
3. Control module: The control module is the electronic component that controls the burner. If it is malfunctioning, it can cause the burner to spark.
4. Surface burner receptacle: The burner receptacle is the part of the range where the burner plugs into. If it is corroded, it can cause the burner to spark.
5. Burner itself: If the burner itself is malfunctioning, it can cause it to spark.

It is important to unplug the range from the power source before attempting to diagnose or repair the issue. If you are unsure about how to troubleshoot and fix the problem, it's best to call a professional technician or the manufacturer for assistance.

The spark electrode sends a spark to ignite the gas in the burner assembly. If the spark electrode is defective or worn out, it might not produce a spark, or the spark might be too weak to ignite the gas. As a result, the spark electrode will make a clicking sound when the burner is turned on, but the burner won't light. If the spark electrode is defective, replace it.

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I would check that the plates are on correctly. Make sure they are aligned and sitting properly. Sometimes they move while cleaning and give you a bad ground connection for the spark.

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Range: Gas burner won't spark or ignite A surface burner igniter switch and a spark module activate the spark electrode when a burner is turned to the "Lite" position on a gas range's cooktop. If the surface burner switch, spark module or wiring in that circuit fails, the spark electrode won't work, and as a result the gas burner won't light. If those components work but the electrode won't spark, the problem could be that the spark electrode is coated with spilled food of is bent or broken. In addition, the electrode won't spark or ignite the burner properly if the ceramic insulation sleeve below the tip of the electrode is cracked or broken. If the gas burner isn't lighting, these repairs may help.
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See all articles These repairs may help solve your problem:

Replace the spark igniter electrode

The spark igniter electrode-also called the surface burner igniter-is an insulated electrode that provides an ignition spark to light a surface gas burner. It sparks and makes a ticking sound when the burner switch is turned to the Lite position. Replace the spark ignition electrode if it fails to spark or if the ceramic insulation sleeve is cracked or chipped. How to Replace a Spark Igniter Electrode in a Gas Range Find This Part

Replace the surface spark module

The surface spark module is in the ignition circuit for the gas surface burners. When a surface burner control knob is turned to the "Lite" position, it provides voltage to the spark electrodes on the gas surface burners. If the surface spark module fails to provide the electrodes with voltage, then it should be replaced. Find This Part

Replace the spark igniter switch

The igniter switch is an electrical switch on the stem of the gas surface burner control valve. This switch completes a circuit to the surface burner spark module, causing the burner igniters to spark when the burner switch is turned to the Lite position. Replace the burner igniter switch if the burners don't spark when you turn the burner control knob to the Lite position or if igniters spark constantly even when the burner knobs are in the Off position.

Yes,all burners spark as a safety feature in the event any gas knob is turned on.
The non sparking burner could be from a bad spark electrode, poor grounding on the burner cap or a bad spark switch for that burner.

Hi,
Here is a tip that I wrote to help people troubleshoot problems with their cooktops not igniting.

Cooktop Range Stove spark ignition does not work
http://www.fixya.com/support/r5649407-cooktop_range_stove_spark_ignition_not

heatman101

There are three parts to the ignition system typically.

The ignitor that is either in the burner or outside the burner.

The spark ignitor switch that is located on the burner control. (( one for each control ))

The spark modual. the modual creates the hi-voltage spark.

If the burner that does not ignight with its control does not spark but does spark with one of the other controls then the spark ignitor control switch is bad.
You can test it with one of the other burner control knobs. (( just try a working burnder and when it clicks look at the bad burners ignitor and look for the spark.))

If the bad burner that wont ignight does not spark then either your modual is bas or the ignitor is shorting out.

If you see any little spark but it does not spark from point A to Point B like the other burners then your ignitor is shorting and should be replaced.

If your ignitor is ceramic and it is cracked, then it should be replaced.

You may have a bad burner switch. If you turn one of the other burner switches to make the spark modules spark look and see if the electrode is sparking at the bad burner. Most of the spark modules send a spark to all 4 burners when activated. If it sparks when another burner is activated open the valve and see if the burner will ignite. If so you probably have a bad burner switch.

ONCE BURNERS HAVE LITE TURN THE BURNER KNOB BACK THE OPPOSITE WAY A LITTLE BIT AND SEE IF THR IGNITER QUITS SPARKING, HOPE THIS HELPS.

You say you have no sparks coming from your gas range, but your rear burner is lighting. That doesn't quite make sense. If some of your burners are lighting, then the problem can't be with the spark module. The spark module sends a spark to ALL the igniters at the same time. That is, EACH burner switch, when turned to ignite, will cause a spark to go to ALL the burner igniters at the same time. Just watch the next time you turn one of your burner switches on, and you'll see a spark at all the burners simultaneously. This is normal. I suspect that you have a bad igniter switch or wiring harness. For example, if you have a front burner that won't light, but WILL light when you turn on another burner, the spark is being provided by a working burner switch. This is also normal. Now, am I assuming that your back burner will not light properly, but will light if you use the front burner? If so, the burner switch for the rear burner is probably bad, or the wiring harness has a break somewhere. Now...if you have no sparks, as you say, but randomly a burner will light, then I would suspect a bad spark module. I hope I'm not confusing you here. In a nutshell: One burner doesn't work, but all others do - bad burner switch, or wiring harness. No burners light, or light randomly - spark module. I hope this helps you.