Hi I'm Vance and welcome to Repair and Replace.
The temperature sensor is a critical part of the oven heating system.
If the sensor is defective the oven temperature will not be accurate.
When the sensor fails completely it will prevent the oven from heating at all.
In this episode, first we'll learn how the sensor works,
then we'll test the sensor to see if it's faulty.
And finally we'll learn how to replace it.
Let's get started.
The oven sensor is a heat sensitive resistor known as a thermistor.
The control board sends an electrical current through the sensor to determine the temperature.
As the temperature increases so does the resistance.
Based on these readings the control board will cycle the heating elements on and off
to maintain the cooking temperature.
We can test the resistance to verify if the sensor is defective.
If the resistance is outside of the rated values
then the control board will misread the temperature and will over compensate.
This can cause the oven to overheat or under heat.
Additionally if the sensor fails, and has no resistance,
then it will prevent both elements from working.
In many cases you'll see a temperature sensor error code.
For whirlpool models this will likely be an F3E0 or an F3E1 code.
Frigidaire and General Electric models will show an F3 or an F4 code
If you're unsure then check your oven manual.
Now if you didn't get a code and you're unsure that the sensor is the problem,
then you can watch more in the troubleshooting videos linked below.
To begin you might need a screwdriver, a nut driver, gloves, and a multimeter.
Always be safe and disconnect the power at the breaker.
Since there might be some sharp edges it's best to wear cut resistant gloves.
Gently pull the range slightly away from the wall.
As soon as there's enough room go in behind and unplug it from the receptacle.
Make sure that there isn't too much tension on the cord.
Now slide the range all the way out so you have plenty of room to work.
On the back of the oven is a cover panel.
Some models have a small panel near the top and a larger panel near the bottom.
Now remove the screws.
The panel will likely be sitting on several hooks.
Simply lift up to remove the panel.
First wait for the oven to cool as any residual heat can affect the multimeter test.
Locate the sensor on the back of the oven.
It's usually near the broil element off to either side.
Now disconnect the wires.
Next set the multimeter to the resistance setting, and adjust the range if needed.
Now touch each probe to each terminal.
At room temperature you should get a resistance of around 1100 ohms.
If the reading is significantly off and is under 1000 or over 1200 ohms
then the sensor is faulty and should be replaced.
As well, if there is no resistance and no continuity,
then the sensor should also be replaced.
Next test to see if the sensor is shorted to ground through the oven frame.
Do a continuity test from each terminal to the shiny metal body of the oven.
If you get any resistance, then the sensor has shorted and will need to be replaced.
Not all models use the same temperature sensor.
To find a match enter your model number on the AMRE supply website.
This will bring up a parts breakdown with the exact replacement parts listed on the side.
Some models will have sensors mounted from inside the oven.
Other models will be accessed from the back.
Simply remove the screw to replace the sensor.
Align the new sensor and tighten the screw.
Then reconnect the wires.
Align the back panel and replace the screws.
Now plug in the cord and push the range back into place.
Next reconnect the power.
Now you can test your oven.
If this still didn't solve your problem,
then check out our troubleshooting videos linked in the description below.
For more troubleshooting videos on water heaters,
furnaces, and appliances, then subscribe to our channel.
And if you need help you can call or visit an AMRE location to talk with our knowledgeable staff.
Thanks for watching.