Appliance Repair

How to Test an Oven Sensor

Is the oven underbaking? It might not be the element—it could be a faulty sensor. In this training video, we walk through a simple diagnostic using a multimeter set to Ohms to test the oven temperature sensor at room temperature. Learn what the correct reading should be (~1080Ω) and how to know if it’s a calibration issue or time to replace the sensor entirely. This is a fast and reliable test every maintenance tech should know.
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Transcript

 Now. What you do, if you do notice that it's under baking like this, like the temperature's not reaching the proper temperature, you wanna definitely take a look at this oven sensor over here. Okay? So the oven sensor is what's gonna measure the temperature internally, and that's a very easy test to do.

All you need to do is go ahead and measure the resistance on the sensor while it's at room temperature, and if you put your multimeter lead on it. And set the multimeter to Ohms. What you should see is approximately 1080 ohms at room temperature. Alright? So you're gonna take your multimeter, you're gonna measure that resistance.

If you get 1,080 ohms, that means the sensor is good. You don't have to replace the sensor. More than likely, what you need to do is you need to calibrate the oven. Now, if you get some bogus resistance, like instead of, so we go back over here to the graphic. If instead of getting a thousand a Ohms, you're getting.

50 ohms or 2000 ohms or something like that, 100% replace that sensor because it's bad, right?