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Author Topic: Flame doesn't chase back down burner tube  (Read 281 times)

Offline VeggiePoweredHandyman

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  • Member Since: May 2017
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Flame doesn't chase back down burner tube
« on: May 31, 2017, 10:54:45 AM »

I've got an antique stove with an unusual problem.
4 burners light from one pilot.
3 of the 4 work normally.
The last one will work if lit by a lighter directly.

However, if will not light from the shared pilot.
All orifices are clear of all grease, ash, debris, etc.
Gas comes out of the ports on the side and goes down the pilot tube - but the flame does not chase it back down the tube to light the rest of the burner.Instead, there is just a constant flame coming out of the burner tube on the pilot side of the tube.  (which means that gas must be successfully flowing out of the side ports of the burner down the tube, as designed.)

The distances and clearances of the one that doesn't work is the same as those that do. 
The adjustable air vents are the same - though I also tried moving them from full close to full open and every point in between, with no change.

I'm all of of ideas as to how to fix this.

Offline okfine

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  • Member Since: Mar 2014
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Re: Flame doesn't chase back down burner tube
« Reply #1 on: June 07, 2017, 02:43:57 PM »
If possible I would swap the burner heads around to see if the problem follows the original burner head. Does the flame on the offending burner head seem as vigorous when you light it with a lighter as the ones that will light off the pilot?
Good Luck

Offline VeggiePoweredHandyman

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  • Member Since: May 2017
  • Posts: 2
Re: Flame doesn't chase back down burner tube
« Reply #2 on: June 07, 2017, 04:24:04 PM »
If I recall correctly (its been a few days since I was at this client's house), the burners are not symmetrical, it didn't look like they could be swapped - but then I didn't check the 2 at the far end (its a 6 burner stove), so maybe one of the last two (that use the other pilot) would work.

The flame does look about the same, but I realize (with help from another appliance forum) that there are two entirely independent gas inlets, one for the main burner, and one for the little "simmer" burner which also lights it from the pilot, and both have an adjustment independent of each other, independent of air opening, and independent of the dial setting.  I haven't fiddled with that yet.

Between that, and your suggestion, I should be able to narrow it down to one exact thing next time I'm over there.

Thanks

 

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