Humidifier solenoid does not shut off with heat cycle.

[Fasterpatrick]

My nest is wired correctly and set up correctly but the humidifier solenoid runs constantly, unless I turn down the setting for the humidity.  Now they say that if you set it to humid+heat and fan to activate. the humidifier will only operate while the furnace fan is running. Well mine is currently running all the time if I turn the required humidity up off the default setting. Any suggestions on getting this to work correctly, I don't need to waste all this water.

Thanks,

Patrick 

[Fasterpatrick]

I think i solved this, but it still bugs me. the thermostat triggers the humidifier solenoid as long as the thermostat calls for heat. my furnace has a cycle limit and this will cause the furnace to run and shut off and start again all this time the humidifier solenoid will remain open. Now as a controls engineer i find this problematic, I would like to see in a future update that the solenoid would be triggered with fan operation. 

[baderup99]

I have noticed this on my setup as well. The solenoid appears to remains open, wasting water, while the heat/fan is off. Is your conclusion that it remains open "in between heat cycles"? I first noticed this because I could hear water running when the system was not blowing any air and thought that was strange; I had to go into the Nest settings and turn off the humidifier setting and it turned off immediately. IMO, water should never be flowing into the humidifier filter while the fan is off.

[Jhonleanmel]

Hi folks,

Thanks for posting, baderup99.

A few questions: what Nest Thermostat do you have? Check this link to know what thermostat you have. Since when has this been happening?

Best,
Mel

[baderup99]

3rd gen Nest Learning Thermostat

[baderup99]

Mel, I just got my Nest a month ago and it's always been like this.

[Jhonleanmel]

Hi baderup99,

Thanks for those details. I suggest reaching out to a pro technician so they can check your system and your entire wiring configuration.

Best,

Mel

[EmersonB]

Hi everyone,

@baderup99 I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

I appreciate the help, Mel. 

Thanks,
Emerson

[Jhonleanmel]

Hi folks,

Just one quick final check in here since activity has slowed down. We haven't heard from you in a while so we'll be locking this thread if there is no update after 24 hours. If you have any new questions, updates or just a discussion topic, feel free to start a new thread in the Community.

Thanks,
Mel

[baderup99]

I've decided just to manually turn on/off the whole house humidifier through the app as needed. I don't want to pay for a Nest Pro HVAC person to come out and figure out what's going. I figured if I can turn the humidifier on/off with the App that it could probably be a software fix. Again, the humidifier starts when the heat/fan turns on, but it doesn't stop when the heat/fan turns off.

[Jhonleanmel]

Hi baderup99,

Thanks for sharing the workaround for now. Please let me know if you have other questions or concerns as we'd love to help.

Best,

Mel

[Jhonleanmel]

Hey there baderup99,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Mel

[Markjosephp]

Hello baderup99,

It has been a few days since your last reply, and we're am going to lock the thread within 24 hours. If you have any questions, please feel free to create a new post.

Thanks,

Mark