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STOVE: Burners go to highest temp regardless of the knob position

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No matter of the range from 1 to 10 you turn the knob to, the burners go on and to

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Old 05-21-2009, 04:49 PM
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Post STOVE: Burners go to highest temp regardless of the knob position
Model Number: FEC3056ABB   Brand: Frigidaire   Age: 1 - 5 years   

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No matter of the range from 1 to 10 you turn the knob to, the burners go on and to the highest temp... very red.

Also, the hot surface light indicator does not come on anymore.

I looked at the switches and did not see the problem with them. Is it something I am supposed to see? When I turn the knob there is a contact. And that's why the burners go on.

However, who is responsible about delivering the right amount of current to the burner? Is it the switch under the knob? If yes, how? What does it have to regulate the current.

What about the connectors at the burner side? The wires from the switches go to the burners and connect to 1,2,1a,1b,2a,2b.

Are there any switches at the burner side that might be the cause of the problem?

One more thing concerning the hot surface indicator light: if I disconnect it, does it affect any other operation? Is it just a light or a fuse?

I am trying to determine if I need to go ahead and purchase the switch.

Thanks


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Old 05-22-2009, 12:19 PM
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Sounds like you are dealing with two different issues. The infinite switch is what determines the output to the element and does this through the use of a bi-metal thermostat inside the switch. So if the element only goes to high and off, the infinite switch has failed. As for the hot element light, it is controlled by a switch located inside the element connector box and is actuated by the rod protruding into the middle of the element. If it is no longer working, it could be the light as the problem, or the circuit to the light. You mentioned Burners so are all the elements doing the same thing or just one? And if you could verify the model number, the one provided may have a missing or mixed up digit that is preventing me from being more specific with my answers.
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Old 05-26-2009, 10:30 AM
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Post Pilot light

Thanks Brian for your reply.

I was afraid that the element switches at the burner side called 1a 1b 2a 2b has anyting to do with setting the voltage limit. I am talking about the limitor switches in other words.

Is the bi-metal that thin reddish sheet of metal inside the switch? So does it like expand and shrink or what? I am just curious to know how it works and passes different levels of voltage just like a varying resistance.

OK well I only have one light for all called "hot surface light."

One terminal is connected to the P line that would be actuated if the L1-H1 switch closes. The other terminal of the light is connected to the Red line comming from the outlet. But to have a closed circuit, L2-H2 switch must close as well. That's why I am afraid something's wrong at the element burner side.

I am thinking of buying one switch and disable all but one burner circuit and see if it works.

Do you think it is OK to measure the voltage difference at the switch to see if it gives different levels between the highest and the lowest while ofcourse the power is on?

Note: I have attached the circuit diagram.

Thanks,
Tee
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Old 05-26-2009, 10:43 AM
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The bi metal at the element only opens and closes based on the heat from the element causing the metal probe in the middle to expand and contract. So the switch will only open and close. It does not act like a variable resistor. It only opens and closes the circuit. Your range uses the same light for the pilot indicator and the hot surface so it should be illuminated if one of the element limiters is closed, and/or any one of the pilot contacts is closed in one of the infinite switches. The infinite switch also only turns on and off by completing the circuit between L1 and H1, and uses a bi metal thermostat to cycle the circuit on and off. So if you check voltage from the infinite switch, you will only see the voltage on and off. It does not increase or decrease based on the temperature selected. So your element only working on high is a problem with that infinite switch, while the indicator light never turning on, is more likely a problem with the light itself.
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Old 06-01-2009, 11:20 AM
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Default frigidaire part#318120505 Model FEC30S6ABB

Thanks brian for your input. I am in the process of finding an infinite switch to replace one of the four i have and try and see.

I can't find the infinite switch for a good price. They are expensive.

I even cannot find a replacement kit just like those universal ones available for other models.

If anyone knows where to buy Frigidaire part #318120505 for a cheaper price please let me know.

I found them for between $60 to $85! and I need FOUR!
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