Nest Thermostats Clicking noise

[MonPop]

Hi there, ever since I installed the Nest Learning Thermostats in my condo a couple months ago, I started hearing these clicking noises. 

The noises were intermittent when the AC was on in the summer, but now that the building switched to Heating, I hear the clicking continuously and it’s really bothering me (I also had to remove the Y1 wire at that time as I had the E80 error which was a nuisance). 

Is the clicking noise a compatibility issue with my fan coil unit? I read here that other people had the same issues and it’s about voltage and power issues, etc. is there any risk of damaging my fan coil units? 

If there is no easy fix for this, I would like to return the thermostats back to Google and get a refund (I’m past the Best Buy 30day return policy). 

Please advise.

[EdwardT]

Hi MonPop,

Thanks for reaching out. I'm sorry to hear that you're having an issue with your Nest Thermostat. I'd love to know more about this and I have a few questions:

• What type of Nest Thermostat do you have?
• How is your Nest Thermostat wired?

If you haven't yet, please try the troubleshooting steps on this article to isolate the issue.

Thanks,

Edward

[aatienza]

Hey there,

I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have. 
 

I appreciate the help, Edward.

Thanks,

Archie

[MonPop]

Yes, still need help. I have the Nest Learning Thermostats. My fan coil units are Unilux LE450. Do you know if they are compatible? 

[EdwardT]

Hi MonPop,

Thanks for the response. Could you share how your Nest Thermostat is wired? Also, please check the power readings of your Nest Thermostat. You could find this info by going to Settings > Technical Info > Power.

Thanks,

Edward

[EdwardT]

Hey MonPop,

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do. 

Thanks,

Edward

[EdwardT]

Hi MonPop,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward

[MonPop]

Here are my thermostats power readings:

Voc 31.78V

Vin 16.87V

Lin 20 mA

[MonPop]

Wires: Y1 cool, G fan, Rc power, W1 heat

[EdwardT]

Hi MonPop,

Thanks for the response. Your power readings look fine but it's possible that you may need a C wire for your Nest thermostat. We'd like to know more about this. Please fill out this form so we could investigate further.
 

Thanks,

Edward

[Jeff]

Hi MonPop,

I just wanted to jump in real fast to see if you saw Edward's reply and to see if you were able to get that form filled out. If you need any assistance with that, just let us know.

Thanks,
Jeff

[Jeff]

Hi everyone,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

Thanks,
Jeff