Humidification

[yidoudou]

I have a problem with how the Nest thermostat works. Can somebody enlighten me? Humidifier is supposed to be on only with furnace heat. This nest device will turn on the fan even after heat is off. This isn’t normal. It should only call for humidity if the heat is also called for.

I see the user JerryR2 had exactly same issue as I do, see details in following link, but he did not post the final solution in his post, does anyone know how to control the Humidifier only works when heat is on? thank you.

https://www.googlenestcommunity.com/t5/Nest-Thermostats/Humidification/m-p/357709#M76598

[jenniffert]

Hi yidoudou,

Thanks for reaching out here in the community! I’m sorry to hear you’re having difficulties with how the Nest thermostat works with your humidifier. I’m happy to help with your concerns about whether the Nest thermostat will turn on the fan after the heat is off.

To better resolve your inquiries about how the humidifier should work, I'd like to ask the following:

• What is the model of your Nest thermostat? Here’s a helpful article about how to identify your thermostat model.
• What type of HVAC system do you have?
• Do you have a standalone or integrated humidity system?
• Would you mind sharing a picture of your wiring installation?

Please keep me posted.

Best regards,

Jenniffer