Electric oven will not maintain temperature. drops 20 degrees

Both gas and electric ovens will cycle on and off throughout the cooking cycle to maintain the set temperature. When the oven temperature has dropped below the set temperature, the oven cycles on again to provide heat and will cycle off again once the temperature is higher than the set temperature.

If oven is electric pleace check that the heating elements are ok, could be that only one or two elements could be the only heaters hence luck power to maintain temparature when open or gets too slow to preheat.

Hello Peter;

My name is Peter. I am a retired field service appliance technician.

I recently repaired a oven that would be off as much as 200 degrees. The normal operation of your oven is to rise 20-40 degrees above set temperature and shut down until it drops 20-40 degrees below set temperature, turns back on and repeats the cycle again.

Generally, there are only three components that control your oven temperature:

1.) The Heating Element - If you are getting heat your heating element may be good. To be on the safe side inspect the two connections on the back wall to ensure they are not corroded.

2.) The Thermocouple - There are several different thermocouples depending on your model and if your have gas or electric. These are easily replaced.

3.) Oven Control - Here again there are several different controls, both mechanical or digital.

I just purchased a oven thermocouple and a reconditioned digital control over the internet for under $75.00.

IF YOU HAVE A DITIGAL CONTROL - GROUND YOURSELF BY TOUCHING BARE METAL. STATIC ELECTRICITY WILL KNOCK OUT A BOARD.

So, go into the following website put in your model number and select parts. Several diagrams with part numbers will appear. Your model number is on a metal plate on the face of your oven after you open the door.
Fine your thermocouple and oven control. Copy these part numbers and search the internet for best price.
First, replace the thermocouple. If this solves your problem then return the control for credit if not install the oven control. The highest probably is you have a bad thermocouple

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Generally the oven temperature will fluctuate as much as 30 degrees above or below the set temperature. The longer the oven is on, the less the temperature fluctuates. If you measure the highest and lowest temperatures readings with a thermometer after the oven has been preheated at least 20 minutes, you should come up with an average temperature somewhere within about 10 degrees of the set temperature. You can calibrate most ovens up to 35 degrees higher or lower if it is off. Any more than that requires replacing parts.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jeffrey_634abadf963e31e5

if it is an electronic timer temp controller you might want to check it

Sadly ours performs this way also. I've always had GE wall ovens and NEVER did they take very long to get up to temperature.
Has anyone else communicated with you about this problem?

You will need to replace the temp probe Call704-891-6557 we'll tell you how to do it safely.

Technician just left our house with same issue. Jenn-Air had issued a technical bulletin as the temperature probe is mounted directly to the heating element, and measures the heat of the element, not the oven. Their fix is a revised temperature probe that goes at a 90 degree angle away from the heating element.

If your temperature is consistent, just off by a set amount of degrees, there is an adjustment you can make at the control panel.

Is this a gas unit? If so you might have a weak oven igniter.

After it drops temperature, how do you get it back to the desired degrees? It sounds like the thermostat isn't keeping up.