GE JGSP31GER Gas Oven doesn't heat up hot enough

Good Morning Friend,

I understand that your Frigidaire oven will not heat to temperature if you set it to 350 degrees. I see that you have to set it to 450 degrees for it to heat up, and then turn it back down to the desired temperature. Please try resetting your appliance, by either unplugging it or shutting the power off at your home's circuit breaker, for 3-5 minutes. Restore power, set the clock and try setting the temperature to 350 degrees. I ask that you please follow up with a comment on the post, at your convenience, to advise if further troubleshooting is needed or if your appliances status has changed successfully. Hope this is helpful.

-Best Regards-
WP

The way the oven works is like so:
1) User sets the desired temperature
2) Power is sent to the ignitor
3) The ignitor is then energized, drawing 3.2 amps of current
4) When the 3.2 amps is drawn, the gas safety valve is allowed to open and gas flows into the burner assembly in the oven.
5) This gas is then ignited, causing the oven to heat.
6) As the oven heats up, the oven sensor, which is the metal rod located at the top on the rear oven wall, converts the heat into an electrical signal, relaying this information to the main control which in turns displaying the temperature.
(In models with a dial thermostat, there won't be a sensor, though a metal wire with a bulbous end will be present, which is actually connected to the thermostat.)

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

Good Morning! I would check the oven temperature sensor first. There are a lot tutorial videos that can be found by Googleing, "How to test my oven temperature sensor." If the sensor is good, and reads 1100 ohms at room temperature.. then the issue youre experiencing is likely control board related. Given that the part is no longer available new, the oven board will have to be rebuilt. Fixyourboard does this and offers a 2 year warranty with each remanufacture.
WB27K5073 GE General Electric Oven Control

Typically an oven beeps when the interior temperature macthes the temperature where you set the dial. This is an audible signal to that fact and particularly helpful when you need to pre-heat the oven. For example it you want to cook something at 350 degrees, you set the dial at 350. When your oven reaches that temperature it beeps to let you know. Some cooking directions tell you to preheat your oven. In that case, when you set the dial to 350 and wait for the beep...you know you are safe to start your cooking process because the oven is now pre-heated to the temperature you set. If your recipe requires a pre-heated oven, and you don't wait for the beep, your taking a guess at what temperature you're cooking your food. Additionally, if you want to know what the internal temperature of oven is and your oven is heated...you simply turn you dial setting and listen for the beep. Again, if you set your oven at 350 and you want to know how hot your oven is... slowly turn the dial setting. If the oven beeps at 275 then that's how hot your oven has gotten. To let it finish heating to 350 just reset the dial and wait for the beep.

pull out the racks and remove the bottom floor of the oven,turn it on bake,if the ignitor doesn't glow most likely it's bad,if it does glow and it doesn't ignite within 40 to 60 seconds the ignitor is bad.even though it glows doesn't mean it's good,it works by amps.it takes 3.2 amps.for a flat ignitor to open the gas valve and 2.5 amps for a round ignitor to open the gas valve.

I suspect a faulty ignitor. It must draw a certain amount of amps to open the gas valve

XL44

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REPLACE HEAT SENSOR

Check and or replace the oven glow bar ignitor.

most common issue is a bad bake ignitor, easy fix, probalby about $75, located on the side of the bake burner, simple to replace a few screws and 2 wires

1. Do both coils get red hot? Try with bake @ 400F, then with broil to be sure. I recently had a bad lower bake coil, but the oven got hot slowly since the broil top coil comes on periodically to even up the heat in the oven. Replacing the lower coil was easy, about a 15-min job, but I had to pre-tap the screw holes on the coil terminals since my oven had extremely short wires.

2. If the coils are ok, the problem may be with the thermocouple or control board.