Hi srubin33,
Thanks for reaching out to us. To check the accuracy of the humidity readings on your Nest Thermostat, you can perform a simple calibration test using a known accurate hygrometer. Here's how you can do it:
- Ideally, you should use a high-quality hygrometer that is known to provide accurate readings. If you have two hygrometers that show matching temperatures, you can assume that one of them is accurate. Choose the one that you trust the most for this calibration test.
- Position the accurate hygrometer next to the Nest Thermostat in the same room. Make sure they are not affected by direct airflow or other factors that could influence humidity readings.
- Give both the accurate hygrometer and the Nest Thermostat some time to stabilize and adjust to the room conditions. This could take anywhere from 30 minutes to a few hours, depending on the stability of the environment.
- After the stabilization period, compare the humidity readings on both devices. If the Nest Thermostat consistently reads higher than the accurate hygrometer, it indicates that the Nest thermostat's humidity sensor might be slightly off.
- If there is a consistent difference between the Nest Thermostat and the accurate hygrometer, you can manually adjust the humidity reading on the Nest Thermostat to match the accurate hygrometer. Follow the steps here in the learn about Cool to Dry article.
It's important to note that electronic sensors, including those found in thermostats and hygrometers, can have slight variations and may not be 100% accurate. However, comparing the readings with a trusted hygrometer can help you determine if there is a significant discrepancy or if any calibration adjustments are needed.
Let us know how it goes.
Best,
Zoe
