Hob ring acting the maggot.

Hi All,

Looking for some help.
One of my gas hob rings is (I think) on its last legs.
It’s fairly rusted / eroded and it lifts apart which the other two don’t.
The gas flows fine and lights but as soon as I let go of the knob the flame goes out.
The only manufacturer/ make I can see is SMEV. (???) is this a known make?

I’m wondering could this be something that could be fixed or would I be looking at a whole new hob?
I could and do get by with 2 rings but would be handier to have the 3rd one working.

As Jon said but also get a wire brush to the under side of the top plate ,clean the groves our of the flame spreader, the flame may be blocked from going out trough the groves to reach the thermocouple. then get one of those green scrubs with a bit of jiff to clean the stainless top .to work properly it should have a smooth airflow all the rust won't help.

The two pieces in your photo should always come apart for cleaning,if the other ones don't they may be just stuck together for lack of cleaning

It looks like the 2 screws that hold it all together have rusted and broken. Replace them, clean all the rust and try again before replacing the thermo couple.

Thanks all for your replies.
I gave the pieces all a good scrum with wire wool and are now cleaner than ever.
I tried it and it seems that the thermocouple is loose and if I just push it up a little from underneath the gas stays on so looks like it’s working ok. (The thermocouple that is). Just not sure how to make it sit up a little like the others. A bit more investigation needed.

The little screw thingys are as Mark said very degraded and am wonderIng if they are really the problem.
Martin was saying that these all should come apart for cleaning purposes which makes perfect sense. I had a look at the other 2 burners (which are working fine) and they really seem rigid and I don’t want to go forcing them. They really look like they are not meant to be taken apart.
Are these definitely meant to come apart? Are there some screws to be loosened or something?

These burner assemblies are held together, and in place, by two screws. The remains of the two screws on your burner can be seen in your first photo on the underside of the top plate. You will need to remove the remnants from the Hob plate and replace the screws when re-assembling the burner.
The thermocouple is, usually, held in place with a clip fitted underneath the hob. The clip is flexible/springy so some movement will be felt in the thermocouple. It is possible, that like the screws, this clip has corroded away and just needs to be replaced.
Make sure, before re-assembly, that the area around the base of the burner is perfectly clean as this is where the air enters to mix with the gas when the burner is operating.