There are 2 simple tests to check the thermometer accuracy, for upper and lower readings.
- For upper, insert probe into boiling water, it should be 100 degrees.
- For lower reading fill a glass with ice and add water, stir well, adding more ice as it melts down. Wrap it in a towel and inset the probe into the water, it should read zero.
- For both options take care that the probe isn’t touching the pot or glass, or you may get an inconsistent reading.