Having trouble connecting to wifi

[Missylee4]

I've had nest for a few years and now all of the sudden it will not connect to wifi.  I've typed in my wifi and password and still won't connect.  I've restarted it and still won't connect.  I have 2 wires, red and white.  Not seeing this as the problem as it's been working for years.  I've taken it off to charge as it said low power.  It doesn't seem to hold a charge.  

[CoolingWizard]

On a two wire system, there is no Common wire to go with the R (power in) wire.  Your system system take the power incoming on the R and when needed, connects it to the second wire to activate the heat.  Without a common wire the charging can be erratic at times. If you add a C wire your charging will be far more stable and efficient.  When the power get very low the nest disables the WiFi in order be able to control the HVAC system longer. There is also a micro USB on the back of the thermostat you can remove the thermostat and plug it into a wall charger and charge it up that way in the meantime.

Ken, The AC Cooling Wizard 

[Markjosephp]

Hi all,

Chiming in to see how I could help.

Thanks for the information, Ken.

@Missylee4, in addition to what Ken says. If your thermostat gets a low battery, it'll disable some of its features, including Wi-Fi, wake on approach, etc., in order to save the battery. Charging it manually via micro USB can be temporary, but for long-term use, I'd suggest installing a C wire or a Nest Power Connector to help avoid power loss. Also, If the battery level falls below 3.7V, the Wi-Fi connection will be lost.

Feel free to let us know if you have more questions in mind.

Best regards,

Mark

[EdwardT]

Hi folks,

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]

Hi folks,

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