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Question about the Nest "No" Jumper wires needed

BigGameJames
Community Member

Hi Everyone,

 

I just purchased a Nest Learning thermostat and installed it.  My original thermostat used a jumper wire between the Rh and Rc terminals.  There was only one power (red) wire coming out of the wall. The instructions for setting up the nest directs not to install a jumper wire. Here what it states on the instructions, 

"Instead of using jumper wires, Nest Learning Thermostats use an internal jumper between the Rh and Rc connectors. A Nest Learning Thermostat will automatically use this internal jumper if your system needs it."

 

I connected the one jumper wire to the Rc terminal, which activates my AC with no problem. This morning, when turning on the heating, it doesn't work.  My question is, how does the internal jumper automatically work? 

 

 

10 REPLIES 10

Patrick_Caezza
Platinum Product Expert
Platinum Product Expert

To put it simply, it just checks to see if there is power at both terminals and if not it connects them together. There is a little more to it than that.

Post a picture of your original thermostat's wiring here.

MelbaDT
Community Specialist
Community Specialist

Hey folks, 

 

Thanks for responding, Patrick_Caezza. 

 

BigGameJames, I hope you've got the answer you're looking for. If you have more questions, let us know and include the photo being requested above so we can check on it further. 

 

Best, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hey BigGameJames,

 

Checking back in should you still need our help. 

 

Best, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hi, 

 

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

 

Best, 

Melba

EJFarley
Community Member

I am having this same problem and haven’t solved it

EdwardT
Community Specialist
Community Specialist

Hi EJFarley,

 

Thanks for reaching out. I'm sorry to hear that you're also having this issue. 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 and your previous thermostat wired?
  • Have you tried any troubleshooting steps so far?

Looking forward to your response.

 

Thanks,

Edward

EJFarley
Community Member

I don’t know if this counts as solved, but we had to do a factory reset and we were able to get heat.

We have a Nest thermostat and our model is a thermostat-1.4. We have 5 wires from the old thermostat: W, Y, C, G, and Rc (with a jumper to Rh). First installed the Nest in the summer and chose cooling when setting up. Did not have an issue until we tried to get heat just this week. Wondering if we will have an issue come next summer and if we’ll have to switch back to cooling. Will another factory reset be needed?

EdwardT
Community Specialist
Community Specialist

Hi EJFarley,

 

Thanks for the update. I'm glad to hear that you were able to get your Nest Thermostat working. You should not have an issue with switching from cooling to heating. Please observe it for now and let us know if anything comes up.

 

Thanks,

Edward

EdwardT
Community Specialist
Community Specialist

Hi EJFarley,

 

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 trouble from here, as I would be happy to take a closer look and assist you further.

 

Thanks,

Edward

EdwardT
Community Specialist
Community Specialist

Hi EJFarley,

 

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