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Nest not getting constant power.

CMMooney
Community Member

My Nest is working only on battery power. My old thermostat had a red wire to the  RH with a jumper to RC, W, Y, and G. My unit only is used for heat. When I wired into the Nest I used the Y, W, G, and R.  No other jumpers.  What do I need to do??  Thank you.  

13 REPLIES 13

EdwardT
Community Specialist
Community Specialist

Hi CMMooney,

 

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?
  • What is the power reading of your Nest Thermostat? You can find this information by going to Settings > Technical Info > Power.

Looking forward to your response.

 

Thanks,

Edward

EdwardT
Community Specialist
Community Specialist

Hi CMMooney,

 

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

Markjosephp
Community Specialist
Community Specialist

Hello CMMooney,

 

I'm checking in to make sure that you've seen our response. Please let us know if you have any additional questions or concerns before we lock this thread in 24 hours.

 

Thanks,

Mark

Well, I would send phots of everything but I cannot figure out how to do that on this application.  I currently reverted back to my old thermostat and cannot get of the power readings.  I will have to wait to do so until this weekend. 

I have the Nest Thermostat https://store.google.com/us/config/nest_thermostat?hl=en-US

I have the (Y)ellow in the Y, (W)hite in the W, (G)reen in the G and the Red wire that was plugged in to the Rh on my old thermostat in the R.  On my old setup there was a jumper from the RC to the RH.

Markjosephp
Community Specialist
Community Specialist

Hi there,

 

Thanks for getting back to us, @CMMooney. I appreciate you keeping up with our Nest Thermostat. I'd be happy to take a look into this for you.

 

Nest Thermostats don't require a jumper wire. If your current thermostat has this, your system is still compatible, and you do not need to use it. You can follow the same wiring setup as what you mentioned in your original post as your guide and leave the Y wire disconnected, as it was used for cooling.

 

If there’s anything else I can help you with, please let me know.

 

Regards,

Mark

I will give this a try and let you know if it works. 

Ebedia
Community Specialist
Community Specialist

Hello everyone,

@CMMooney thanks for getting back to us. Sounds like a plan. Keep us posted.

 

I appreciate the help, Edward and Mark.
 
Best,
Emerson

Markjosephp
Community Specialist
Community Specialist

Hi CMMooney,

 

It's me again. I'm checking back in — how's it going? Were you able to install your new Nest Thermostat? Please let us know if you still need help so we can assist you right away.

 

Thanks,

Mark

Hello CMMooney,

 

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

 

Thanks,

Mark

I was able to wire the nest back up.  My voltage reads 3.014 and Impedance is 1200mOhm.  

Also Vin; 31.029V lin; 68(w) ps; y-16, YW-68.  

Everything is saying to install the nest power connector or C wire so I will order the Nest power connector.

Markjosephp
Community Specialist
Community Specialist

Hi there,

 

Thanks for letting us know your thermostat's power readouts. It appears that it's not getting enough power from your system. Installing a Nest Power Connector can help provide constant power to your thermostat. Here are some references to help you install your new Nest Power Connector on your HVAC system.

 

 

If there’s anything else I can help you with, please let me know.

 

Regards,

Mark

AbigailF
Community Specialist
Community Specialist

Hey CMMooney,

Chiming in to see if you still need assistance with this. Hope the previous post helped. Let us know if you have additional questions ― we'd love to help.

Best,
Abi

CMMooney
Community Member

I am waiting for the power connector to get here still should be here tomorrow or the next day.