Sous vide showing a temperature that does not match a thermometer in the bath? Accuracy is the whole point of sous vide, so a reading that drifts off is worth correcting, and it is often scale or calibration.
Here is why the temperature reads off and how to fix it.
This article will teach you:
- How the sensor reads temperature
- Why it drifts
- How to check and calibrate it
- When a part has failed
Why the Temperature Is Off
- Scale on the sensor or element.
- Poor circulation creating hot and cold spots.
- A calibration that has drifted.
- A failing temperature sensor.
What You’ll Need
- A reliable kitchen thermometer
- White vinegar
- Your owner’s manual
How to Fix Sous Vide Temperature
- Verify with a thermometer. Compare the bath to an accurate thermometer.
- Descale the sensor. Run a vinegar bath to clear scale on the probe and element.
- Improve circulation. Reduce crowding so heat spreads evenly.
- Calibrate. Use the offset or calibration option if your model has one.
Pro Tip: Always sanity-check against a separate thermometer before adjusting anything. A poorly circulating bath can read correctly at the unit but be uneven where the food sits, which looks like a bad sensor.
When to Look a Little Deeper
Because temperature ties to heating and flow, it helps to check those, and reviewing a unit that will not heat, a circulation problem, or a broken display can reveal the cause.
When to Call a Pro
If circulation is good, it is descaled, and calibration does not help, the sensor has failed, which usually means replacing the unit.
Wrapping Up
An off reading is usually scale or calibration. Here’s the recap:
- Verify against a thermometer.
- Descale the sensor and element.
- Improve circulation.
- Calibrate if possible.
Verify and descale first, and accuracy returns. You’ve got this.