One gas ring will not ignite as there is no spark,all others working ok

It is a gas appliance and it is a Miele, so you need a registered gas technician to service it. In my experience, the spark igniters work on all burners. To clean the burners, remove them all and put them in a large saucepan. Add cold water and dish liquid, bring slowly to a simmer and turn off. When cold, rinse and scrub with a plastic pot brush, paying particular attention to holes and slots. This was a job we did in the restaurant every week. It is a good plan to do before you go to bed for the least disruption.

The product specs says;

Automatic re-ignition •
Sealed burners
•
M Pro Dual Stacked Burner System

So perhaps my hack won't work if they aren't removable.

I found this video :>)

https://blog.yaleappliance.com/new-miele-hr1124-30-inch-professional-gas-range

..

The spark gap needs to have flow of gas across it for ignition to occur. The gas outlet holes at the point where the igniter sparks may be blocked, clean and inspect these for any blockages. Also check that the igniter spike is in the correct place. Careful evaluation of the position of the igniter in reference to the gas ring on the other rings may help you here. Good luck

Hi Cecchung,

I think I know it.
Modern cookers have semi automatic ignition. Behind every knob there is a hidden switch and the switches are wired in "parallel". That means, when one button is put in "sparkstand", all plugs will spark. At least it should be.
In the youtube movie you can see how these switches are in a string.
So I suppose that the switch behind the button for the main burner does not work.
Fortunately, you still can lit that burne r with the other buttons.
Look at the movie, may be you can fix it yourself.

Kind regards, Dik
Maytag Gas Stove Burner Won Light Spark Ignition Switch

if you mean that there is gas comining out and it takes time before the gas ignites then check that the electrodes are not broken as this will allow the spark to go to earth and the gas will have to 'chase' the spark, not advised as the gas could build up and be a potential hazard. remove the top of the gas rings and make sure that they are clean, also clean the metal part with a brillow pad or wire wool to increase the chance of the spark reaching its designated point, ie. closer to to the gas thus ignition will(should) be almost instant. hope this helps.

If you know the power and fuse is ok, and none of the knobs will turn on spark, the only thing left is the spark module. The switches would never all go out at once.  Good luck

try oven if working gas valve system possible ok lift off covers to expose igniter looks like a little wire that arcs a spark to ignite gas clicking is igniter trying to spark ,clean area of debris if any, if no spark will need igniter adjuster /repaired or replaced and gas valve checked for proper function

sounds like the CDI module. I've had it go out on a couple scoots I've owned. Take it to a shop and have them check it

hi...its very hard to replace the parts bi its your self.much beter to call an expert technician to replace it..

tnx gerbee

I had a similar problem on a different gas range but your problem seems the same as mine was.
I examined the underside of the burner and saw a little 'flash' left from the casting process and I filed it off. This made the problem worse; it wouldn't light at all anymore.
I tried the opposite, blocking off the burner channel from the gas feed pipe to the spark gap; problem solved. It hasn't had a hiccough since.
I can only imagine that the flow of gas toward the spark gap was so strong, the gas was blowing itself out.
Not knowing exactly how the underside of your burner looks or how the gas is partially diverted to the spark gap but I drilled a small hole in the casting, inserted a length of copper wire (the gauge used in house wiring), then 'tuned' the flow by clipping part of the wire off and trying it. It might have taken all of 15 minutes to correct the annoying problem.   

Are the other 2 burners lighting with the spark? If so the other 2 are either shorting before the burners or the sparkers are faulty.

To service, the cooktop needs to be completely removed from the bench and disconnected from the gas as the access is from the bottom.

I could step you through it while watching, but to do it this way is not a good idea. It's probably worth ringing a serviceman.