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TNM130-7BKW Brown Gas Range -- Cracking Igniter Electrodes

EstimatedToad

Member
Joined
Jul 24, 2022
Messages
1
Location
Manhattan, NY
Model Number
TNM130-7BKW
Age
1-5 years
Hi, all,

So, my question is about a gas range from a brand that isn't listed here. It's manufactured by "Brown Quality Cooking Appliances." Apologies if I'm naming any components incorrectly here—I'm a bit out of my depth.

When we moved in, two of the burners already had a problem with inconsistent ignition. It didn't take much work to figure out what the problem was: the igniter sits just next to the burner, and there's a small pore in the burner right next to the igniter and below the main ring of pores. The design intention there is pretty clear; the spark from the igniter strikes very close to that pore and ignites the gas. Only, the insulating sleeves on the igniters had cracked, exposing more of the electrode in the igniter and allowing the spark to strike further down on the burner cap and away from that pore—where it failed to ignite the gas. Easy enough fix: I looked up the parts, and replaced the damaged igniters. Worked fine after that... for a while.

However, it wasn't long before the other igniters also cracked, and I've now used all four of my replacements and they've all cracked again. I'm no kind of expert, but it looks like the insulation is cracking from thermal stress. Like, there's no 'pop,' and it's not a dramatic event—they just quietly fracture at some point and then crumble when I'm wiping down the stovetop. It's hard to imagine they aren't rated for the normal stresses of cooking, so I'm guessing it must be happening when there are spills or boil-overs and the hot, exposed igniters get hit with liquid. Even so, that's a pretty common event, so it doesn't seem like it should be breaking things.

Any advice on how to deal with this?
 

Dan O.

Appliance Tech
Staff member
Joined
Oct 9, 2004
Messages
6,356
Location
Ontario, Canada
Those electrode insulators do crack occasionally. I've never heard of them cracking or getting brittle from heat but you can inspect the flame nearest them to see if it is unusual. I don't know if they can be mounted too tightly, putting too much strain on them.

Maybe make sure the burner base or cap isn't loose and movement is putting strain on them, especially during cleaning.

Maybe someone else will also offer suggestions.

Dan O.
 
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