Left burner is not working

Yes, turn it off and get a gas tech out to check it.

I think the heating element is blown. A new element should fix it.

First of all, you need to test the wiring to that burner. If there is no electricity, then you need to replace the plug in. You can get them at an Appliance parts store. If there is electricity, then all you need to do is get a new burner at Lowes or Home Depot. Sometimes the burner gets a tiny crack in the burner that breaks the continuity.

You could have a shorted burner, if it is not then you may have gotten a bad part.

always unplug electricity before attempting to repair on any electrical appliance

This indicates failure (open circuit) of the left front temp sensor. You can search for my solution for replacing a element on a JP939 and JP969. Will likely require replacement of the element (~$160).

Hi,

This is caused by a faulty sensor that is located between the burner element and the top. To replace the faulty part you will need to uninstall the cooktop and remove the glass top. The sensor is a rod a little smaller than a pencil that you will see right on top of that burner.

If you choose not to replace the sensor it will not cause any issues other than you will have to live with that light constantly on and you will know when the top is hot for that element.

Your referring to an electric range I'm assuming. In that case the heating element is only heating to a mid-point then stopping. This typically means the heating element is burnt or is partially burned out. The element is usually user replaceable and requires the old one be unpluggude and replaced with a new one. You'll need to get the element from the manufacturer.

How old is this cook top stove? Does it require replacement?

Check the wiring first, but it is usually the element. When they burn out t hey usually short to ground.

these are cartridge elements corrrect? try reversing the cartidges, now the front small will become the rear small . does it not work in this position? and the newly placed front burner work?? this will determine if the proble lies within the cartridge or the switches