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Nest thermostat not detecting W wire

karimbonix
Community Member

After a couple tries I managed to get everything but the heat working. The W wire is clean and inserted properly but it won't detect it. 

Old thermostat had RH, Y, G, and W/E wires hooked up. I connected them to the R, Y, G, and W receptacles on the nest. 

Heat worked on old thermostat. What are my options here?

10 REPLIES 10

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@karimbonix , by chance can you post a picture of the old thermostat with the wires still attached to it? Also, tell me more about your HVAC system. Do you have Gas Heat?

AC Cooling Wizard

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.

karimbonix
Community Member

https://photos.app.goo.gl/pY5jFmAv2pdRAqUn9

It's a gas furnace and standard AC, all forced air. I just moved in so not too familiar with it yet. They seem to be about 8 years old. 

karimbonix
Community Member

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@karimbonix ,

allow me if I may to educate you a little bit about your HVACVAC wiring on your thermostat. Basically the thermostat is responsible for sending calls for heating or cooling to the equipment. To do this it takes power that’s arriving on the R wire And then send it on either the Y wire for cooling call, or the W wire for heating call. The G wire is usef to turn on the blower fan. 

AC Cooling Wizard

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.

karimbonix
Community Member

@CoolingWizard it doesn't seem to be detecting my W wire at all then. When I check wire status in the settings it sees it as empty. 

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@karimbonix , please try this, press the tab of the W wire and remove the W wire. Take a picture of the W wire so I can see the bare copper conductor.  

AC Cooling Wizard

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.

@CoolingWizard is there anything in the photo that stands out as wrong?

Hi there,

 

Just checking in to see if you were able to resolve the issue with your Nest Thermostat. If you have any other questions, I'm happy to help!

 

Best regards, 

Chris

 

 

@aguilarmateo I returned it and got an ecobee that is working perfectly. Thank you for offering though.