Gas hob niggle.

izwozral

izwozral

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Turn the knob for whichever gas ring, push knob in, press ignition and slowly release.

Repeat umpteen times.

Swear umpteen times.

Eventually gas finally stays lit with a nice blue flame.

So why is it that the gas wont stay lit with the first procedure? Tried turning gas down and slowly releasing and tried it on full flame and slowly releasing, still get the same frustrating game of flame a go go?

Any clues much appreciated?
 
If you have access to the underside of the hob might be worth giving the thermocouple connections a gentle wiggle . If they are all playing up probably wont work but its worth a go as it's free. If they are spade connectors just slide them on and off.
 
Try giving thermocouplings a bit of a clean, may need pushing closer to where the flame would be if hob had lighted. They only need to be a few mm out of bonk.
 
One other clue maybe? When gas first ignites the blue flame is sort of being pushed away from the ring as if being blown, like too much air behind it, if that makes sense.
Three suggesting a thermocouple problem sounds positive. Thanks guys.
 
izwozral said:
One other clue maybe? When gas first ignites the blue flame is sort of being pushed away from the ring as if being blown, like too much air behind it, if that makes sense.
Three suggesting a thermocouple problem sounds positive. Thanks guys.
Click to expand...

Faulty regulator?
 
No lazy yellow flames, good flame picture, it sounds like you aren’t depressing the GCV long enough that the thermocouple has time to warm up correctly.

In a weird way the thermocouples are doing their job. It needs a deliberate action to start a hob
 
Two observations.

1. Can you use that N word on a forum?

2. Come on Oppy, cut to the chase.

3. Malbec tastes reaaalllly nice. 😜

Cheers

H
 
Did they all start at once or have you been favouring one as perhaps better to light. Ours was but eventually both where the same and on inspection the burners had warped I had a friend even them up on a lathe but wasn't 100% successful so ended up renewing them which made a 100% expensive improvement to light and run
 
The flames with air behind them is called flame lift it can be caused by too much gas pressure or to much primary air to the burner try the ring on simmer it should be nice and low I used to come across faulty gas meter regulators in houses and boilers would work ok but you could always tell with the gas hob that the pressure was too high
 
The chef noticed ours wouldn’t stay lit. I removed the burner plates and gave it all a damn good clean, not really expecting much of a change. But we were pleasantly surprised that all 3 lit perfectly from then on.
 
Mine lights instantly the igniter is pressed and stays lit after releasing the the big knob .have a word with Charlie he ows you a favor .
 
, there is a lot of second guessing as to what the problem is, the ultimate solution is to pay for a gas test. This will highlight lock up pressures, indicate regulator problems if they exist and pinpoint the source of your issues. Before you start stripping and servicing parts of the system on a hunch
 
Our old hob needed the button held down for ten seconds after the burner lit. I replaced it (for other reasons) and the new one only needs the knob held in for one second.
The flame size seems similar, but I notice the new one has an earth lead for each burner
 
Looks like I have sorted the problem!

Took off the burner top covers, all looked clean underneath, no gunk or soot. Put the covers back on without screwing them down, lit the gas on all three and they stayed lit, repeated three times, same result, they stayed lit.
Screwed the covers back on. lit the gas again, they went out, repeated three more times, they went out.
Loosened the screws slightly, lit the gas, they stayed lit, repeated three times, they stayed lit.

Happy swear free days.

Thanks to all for suggestions.
 
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