View single post by stainlesssteel
 Posted: Wed Dec 6th, 2006 10:20 pm
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stainlesssteel

 

Joined: Sat Dec 2nd, 2006
Location: San Diego, California USA
Posts: 55
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I have a KitchenAid gas cooktop, purchased new in 1993 by my apartment manager dad. I ASSUME (see below) it's model no KGCT365AAL0
http://home.san.rr.com/emiller/C4718KitchenAidgasrange.jpg
http://home.san.rr.com/emiller/C4716KitchenAidsparker.jpg

Sparker #2 of 4 won't turn off after burner flame ignites.

Sparkers 1, 3 and 4 work correctly: they turn off when their burner flames ignite. You can even blow them out when on a low setting, and the sparker will start up again--a cool magic trick actually, as well as a great safety feature.

Initially, the was no spark at all at burner 2. I replaced sparker 2, not being sure what the model number for the gas cooktop was. It sparks now but again it won't turn off after flame lights. Hoping to check if it sparker 2 was defective i.e. had the wrong resistance vs what the spark module expected, I tried switching the kilovolt-level spark wires between sparker 2 and 1, and sparker 2 and 4. In both cases, BOTH sparkers now ignite flames, but won't turn off. I think i'd need the spark module schematic to understand why...

I've verified correct polarity and grounding of the power outlet with a tester.

I'm ready to just do the shotgun approach and replace the spark module, but it's $98.95 or so at repairclinic.com. Coast Appliance here in San Diego has it at apartment manager price of $77.96, or $113 for the poor slob off the street.

Any better ideas?

Also, does anyone know of generic replacement knobs for this? They are cracked underneath, where they attach to the burner shaft, so they're almost useless in turning that shaft. The "factory" ones are an insane $27.02 each at appliance-parts-warehouse.com.

Irrelevant Time Sink But Interesting Design Observation:

I notice on new entry level gas cooktops the knobs have is a "IGNITE" and then a High/medim low setting. Turning them on is a 2-step process:
1) turn to IGNITE and wait for burner flame to ignite
2) adjust flame high/med/low

Turning on this KitchenAid gas cooktop instead is a one-step process--eliminating step 1 above. It senses (not sure how) when the flame is lit and turns off the sparkers automatically. This auto-shutoff sparker design seems much more elegant, and much safer than the separate IGNITE position: If the flame is accidentally blown out, from say an open window or a draft from opening the base cabinet below, or me playing amateur magician...and left unattended, you risk a nice big explosion and dead-people-generating gas leak. This isn't that unusual if someone isn't there to see the flame go out--for example, left just for a minute to answer the door etc.

This post
http://forum.doityourself.com/archive/index.php/t-22776.html

claims "The sparker changes electrical resistance when heated by the flame. This resistance is then sensed by the module, which, turns off the electric flow to the sparkers"

This makes sense to me...typically resistance varies proportional to temperature (example: Absolute zero - superconductivity). When resistance is low (burner off ) the sparker circuit activates. When sparker resistance is high due to proximity to the burning flame, the sparking senses more current required to overcome the resistance. It then uses that increased current as a flag to tell itself to stop sparking.

Am I missing something, thinking the IGNITE position design is really inelegant and unsafe?


Note:
There is NO model number anywhere on this cooktop....maybe it was on a plate on the under-counter part and was damaged and fell off during installation or ?.... To figure out its number, I spent about 30 minutes at this website looking at service manuals for a picture that looked like my gas cooktop:
http://www.appliance-parts-warehouse.com/whirlpool-parts/Whirlpool-Stove-Oven-Parts-Page-3151.cfm

After about 30 minutes of looking, my cooktop appears to be the KGCT365AAL0. But I'm not absolutely sure.

Attachment: C4718KitchenAidgasrange.jpg (Downloaded 89 times)



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