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Nest Learning Thermostat 3rd Beeping

Xa
Community Member

Help. My Nest Learning Thermostat is beeping each morning for 1 minute when it heats for the first time each morning. I have no c-wire but I fully charged the Nest before installing and according to my stats, 3.83 volts in battery LIN is above 20. According to videos I’ve watched, this isn’t a low battery issue, since it only does it once a day. Thoughts?

1 REPLY 1

zoeuvre
Community Specialist
Community Specialist

Hi Xa, 

 

Yikes! I'm sorry to hear that your Nest Learning Thermostat is beeping for one minute each morning when it heats for the first time, though you've already ensured that the battery is sufficiently charged. 

 

Beeping during heating can indicate power loss or voltage drop, as the thermostat may draw more power than the battery can supply. This can occur if the HVAC system draws more power than the battery can supply. Additionally, some HVAC systems require a C-wire for proper power supply to the thermostat, which can lead to intermittent beeping if the thermostat relies on insufficient battery power. Despite the battery's adequate charge, power demands during heating may exceed its capacity. Here are a few potential solutions:

 

  1. Consider installing a C-wire to provide a constant source of power to your Nest thermostat. A C-wire can help ensure a stable power supply and prevent issues like beeping during heating cycles. If you're unfamiliar with electrical work or HVAC systems, it's recommended to consult a professional technician to install the C-wire for you.
  2. If running a C-wire is not feasible, you can try using a Nest Power Connector. The Nest Power Connector allows you to draw power from the HVAC system's control board and provide a stable power source to the thermostat.

 

Remember, working with electrical systems can be hazardous, so it's essential to be cautious and seek professional help if needed for safe installation and troubleshooting processes.

 

Let us know if that helps.

 

Best,

Zoe