GE Profile Gas cooktop JGP 641 igniter is not working

no,its a bad switch on one of the gas valves,they are piggybacked on the gas valve and are supposed to turn on and off as the valve is turned on and off,on has broken and is on all the time even with that valve in the off position,carefully remove each switch from the circuit till it no longer sparks with all the valves in the off position

could be valve switch or cracked knob

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

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

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

Hi,
Here is a tip that I wrote to give details about why your cooktop will not spark to light the burners..

Cooktop Range Stove spark ignition does not work

heatman101

The spark ignitor is attached to the burner bowl by a retaining clip under the bowl. Simply remove the two screws on the top of the bowl, then you can slide the clip off from the underside

As it relates to 5 burner gas cooktop Model Number JGP 963SEJ1SS
First - Ignite the flame then reduce the flame to between low and medium.  If the igniter continues to click, you most likely have a contact switch issue related to the problem burner.  
Unplug the cook top and turn off the gas.  After the gas is turned off, disconnect the gas line.  
Remove the cook top.  

Unscrew and Remove ALL of the burner bases by lifting them up.  The ceramic igniters may be difficult to remove but they will come loose if worked out slowly.  
Pull of the wire connected to the igniter. 
Remove to cook top top plate from the base, exposing the internal gas valves and wiring.
All of the burners are wired in parallel.   Lift off and unsnap the casing of the problem igniter switch.  The repair may require something as simple as, 1- cleaning the contact strips, or 2- slightly bending the non stationary contact strip to keep it from coming in contact with the stationary contact when in the off position, or 3- replacing the switch. 
Unless you comfortable and understand how electric systems and switches work, this is a job for a qualified repair person. 

Check to make sure that the gas is getting to the igniter. If you can ignite with a lighter or match, than the igniter itself needs to be replaced.

ouch, sounds as ifthe valve has frozen up, replacing hte valve would be the solution