No temperature control on hot plate elements. Is this fixable?

Your wiring diagram and parts schematics are here in the link below. Normally the bottom element does glow read hot after a couple of minutes. Broil elements last a lot longer because they aren't used as much. There is only one Control Board. If I was guessing, I would say the temperature sensor is at fault. Elements either work, or they don't, but you can easily test continuity with a meter. Many parts are discontinued.

https://www.searspartsdirect.com/model/3f7nkrfnvp-001428/frigidaire-pleb30t8ccb-electric-wall-oven-parts

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Hi ,this is quite normal to see the grill element going on an off, in your oven as this is thermostatically controlled to ensure an even grill temperature for your food, once the grill area has reached the set temperature you selected, the element will switch off for a set period. until the air temperature goes below the setting. then switches back on again for a set time. it is easier to notice this action when the grill is on a low setting compared to a hot setting on hot settings you may see the element switching on and off more rapidly or staying on longer, than on low settings.
the switching on and off does not effect the average temperature in the oven so your food is still being grilled by residual heat from the grill element when is has switched to off for a while.

This system is used as it is easier to control and more effective to build the ovens to switch on and off rather than controlling the power level to the element. this activity does not mean your oven is defective or that any parts need replacing.

if you feel that your food is not being cooked efficiently then I would consider a specialist check the oven or give it an overhaul or service if needed.

I hope this was helpful

Hello there and welcome to fixya
When the food you're baking is done on top but not on the bottom--or when baking just takes far too long to finish--the bake element may be burned out. You may get fooled into thinking it's working, because the oven is hot inside. But many electric ovens use the broil element, too, during the preheat and bake cycles. So the food may be getting heated only by the broil element, which causes poor baking results. If the bake element is burned out, replacing it should solve the problem. To determine if the heating element is burned out, watch the part testing video at the bottom of this page. Otherwise, you need to further troubleshoot the oven's electrical system to locate the defective wire or component. When the temperature is consistent but too high or too low, it could be one of several different things. First check to see if the thermostat sensing bulb has come loose from its holder. It could be lying on the floor of the oven or resting on the heating element. This would cause the oven to not heat correctly. If the thermostat bulb is not dislodged, it's likely that the thermostat or sensor is either mis-calibrated or defective. Electronic ovens with a digital display use a sensor to monitor oven temperature. To solve temperature problems for these models, you may need to replace the sensor. On some digital-display models, you can calibrate the temperature using the key pad. See your operator's manual for details. Ovens without a digital display often use a mechanical system for controlling temperature. On many of these units, you can remove the thermostat knob and adjust the knob itself to more accurately represent the actual setting of the thermostat. If, when you remove the knob, there's a screw on the back of it with a small calibration plate, you can loosen the screw, adjust the plate, then tighten the screw again. If the knob isn't adjustable, and the oven temperature is off by more than 30 to 40 degrees, you need to replace the thermostat to solve the problem.

You may get fooled into thinking it's working, because the oven is hot inside. But many electric ovens use the broil element, too, during the preheat and bake cycles. So the food may be getting heated only by the broil element, which causes poor baking results. If the bake element is burned out, replacing it should solve the problem. To determine if the heating element is burned out, you will have to test the element for resistance across the 2 ends , with the meter set on the 200 scale if you get a good reading like 000 it would indicate that the part may be ok but if yoiu get a reading of a 01 or a 1 or lomething like this it would indicate tha part is bad then you need to replace it
However you will also want to First check to see if the thermostat sensing bulb has come loose from its holder. It could be lying on the floor of the oven or resting on the heating element. This would cause the oven to not heat correctly. If the thermostat bulb is not dislodged, it's likely that the thermostat or sensor is either mis-calibrated or defective. Electronic ovens with a digital display use a sensor to monitor oven temperature. To solve temperature problems for these models, you may need to replace the sensor. On some digital-display models, you can calibrate the temperature using the key pad. See your operator's manual for details. Ovens without a digital display often use a mechanical system for controlling temperature. On many of these units, you can remove the thermostat knob and adjust the knob itself to more accurately represent the actual setting of the thermostat. If, when you remove the knob, there's a screw on the back of it with a small calibration plate, you can loosen the screw, adjust the plate, then tighten the screw again. If the knob isn't adjustable, and the oven temperature is off by more than 30 to 40 degrees, you need to replace the thermostat to solve the problem. It won't broil

It's not broken. It is being controlled.

hello there
Usually, when an oven won't heat up or bake, it's because the bake element is burned out. The bake element is the black, pencil- thick tube at the bottom of the oven. When the oven heats, the element glows red. This element has an expected life-span of several years. It may last for only one; it may last for many more. When the element burns out, you need to replace it. Now if the oven It bakes poorly Here are two instances of when food "bakes poorly:" When the food you're baking is done on top but not on the bottom--or when baking just takes far too long to finish--the bake element may be burned out. You may get fooled into thinking it's working, because the oven is hot inside. But many electric ovens use the broil element, too, during the preheat and bake cycles. So the food may be getting heated only by the broil element, which causes poor baking results. If the bake element is burned out, replacing it should solve the problem. Otherwise, you need to further troubleshoot the oven's electrical system to locate the defective wire or component. When the temperature is consistent but too high or too low, it could be one of several different things. First check to see if the thermostat sensing bulb has come loose from its holder. It could be lying on the floor of the oven or resting on the heating element. This would cause the oven to not heat correctly. If the thermostat bulb is not dislodged, it's likely that the thermostat or sensor is either mis-calibrated or defective. Electronic ovens with a digital display use a sensor to monitor oven temperature. To solve temperature problems for these models, you may need to replace the sensor. On some digital-display models, you can calibrate the temperature using the key pad. See your operator's manual for details. Ovens without a digital display often use a mechanical system for controlling temperature. On many of these units, you can remove the thermostat knob and adjust the knob itself to more accurately represent the actual setting of the thermostat. If, when you remove the knob, there's a screw on the back of it with a small calibration plate, you can loosen the screw, adjust the plate, then tighten the screw again. If the knob isn't adjustable, and the oven temperature is off by more than 30 to 40 degrees, you need to replace the thermostat to solve the problem
Hope thisis very helpful for you
Best regards Michael .

When the food you're baking is done on top but not on the bottom--or when baking just takes far too long to finish--the bake element may be burned out.

You may get fooled into thinking it's working, because the oven is hot inside. But many electric ovens use the broil element, too, during the preheat and bake cycles. So the food may be getting heated only by the broil element, which causes poor baking results.

If the bake element is burned out, replacing it should solve the problem. Otherwise, you need to further troubleshoot the oven's electrical system to locate the defective wire or component.

When the temperature is consistent but too high or too low, it could be one of several different things. First check to see if the thermostat sensing bulb has come loose from its holder. It could be lying on the floor of the oven or resting on the heating element. This would cause the oven to not heat correctly.

If the thermostat bulb is not dislodged, it's likely that the thermostat or sensor is either mis-calibrated or defective.

Electronic ovens with a digital display use a sensor to monitor oven temperature. To solve temperature problems for these models, you may need to replace the sensor. On some digital-display models, you can calibrate the temperature using the key pad. See your operator's manual for details.

Ovens without a digital display often use a mechanical system for controlling temperature. On many of these units, you can remove the thermostat knob and adjust the knob itself to more accurately represent the actual setting of the thermostat.

If, when you remove the knob, there's a screw on the back of it with a small calibration plate, you can loosen the screw, adjust the plate, then tighten the screw again. If the knob isn't adjustable, and the oven temperature is off by more than 30 to 40 degrees, you need to replace the thermostat to solve the problem.

hi . i can help.

When the food you're baking is done on top but not on the bottom--or when baking just takes far too long to finish--the bake element may be burned out.

You may get fooled into thinking it's working, because the oven is hot inside. But many electric ovens use the broil element, too, during the preheat and bake cycles. So the food may be getting heated only by the broil element, which causes poor baking results.

If the bake element is burned out, replacing it should solve the problem. Otherwise, you need to further troubleshoot the oven's electrical system to locate the defective wire or component.

When the temperature is consistent but too high or too low, it could be one of several different things. First check to see if the thermostat sensing bulb has come loose from its holder. It could be lying on the floor of the oven or resting on the heating element. This would cause the oven to not heat correctly.

If the thermostat bulb is not dislodged, it's likely that the thermostat or sensor is either mis-calibrated or defective.

Electronic ovens with a digital display use a sensor to monitor oven temperature. To solve temperature problems for these models, you may need to replace the sensor. On some digital-display models, you can calibrate the temperature using the key pad. See your operator's manual for details.

Ovens without a digital display often use a mechanical system for controlling temperature. On many of these units, you can remove the thermostat knob and adjust the knob itself to more accurately represent the actual setting of the thermostat.

If, when you remove the knob, there's a screw on the back of it with a small calibration plate, you can loosen the screw, adjust the plate, then tighten the screw again. If the knob isn't adjustable, and the oven temperature is off by more than 30 to 40 degrees, you need to replace the thermostat to solve the problem.

Dear customer,
i recommend u to try the following routine to sort out this problem

Check timer and clock settings

Reseat the element

Test the element

Test the element connectors

Test the oven temperature control

Test the oven selector control

Recalibrate the temperature control

hope u find this useful. thank you.