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In this guide, we will cover warning signs of a bad Nest Thermostat, troubleshooting the display, commands, temperature settings, strange noises and smells, replacement options, and installation tips. Read on to learn how to tell if your Nest Thermostat is bad and what you can do to fix it.
- Overview
- 1. Find the right troubleshooting steps
- 2. Check your energy history
Sometimes heating or cooling systems can behave strangely. For instance, you may notice your system is always on, it won’t turn on, it turns off and on repeatedly, or it makes strange noises. If so, there may be a power issue. In some cases, you may need to install a C wire (also called a common wire) or the Nest Power Connector to help deliver consistent power to your thermostat.
There are a number of other reasons why your heating and cooling system might be doing something unexpected.
• Your system is acting strangely: If you see one of the issues listed below without seeing an error code on your Nest thermostat, continue to step 2 to troubleshoot.
• Your system is making strange noises: chattering, stuttering, clicking or thumping ‒ this can be caused by your system turning on and off rapidly
• Heating or cooling is always on, and won’t turn off
• Heating or cooling repeatedly turns on and off in a short period
• You see a Delayed or Starts in message on your Nest thermostat’s screen (for example: “Heating is delayed for 2:30 mins”)
• The system fan is always running or won’t turn on
Your thermostat's energy history can help explain why your thermostat unexpectedly turned on or off, or why the temperature changed. Follow the steps below that match the app you use to manage your thermostat.
Home app
1. Open the Home app .
2. Touch and hold your thermostat's tileEnergy dashboard .
3. Select Day, Week, or Month.
Nest app
- Manually Adjust the Temperature. If you've been controlling the Nest thermostat via the app, try adjusting the temperature manually at the thermostat itself.
- Check For Any Error Codes. If that doesn’t bring the heating and cooling equipment back up and running, the next thing to do when your HVAC equipment doesn't turn on is to check the thermostat or mobile apps for any error codes or alert messages.
- See If The Heating and Cooling Equipment Is Turned Off. If you didn't receive any error codes or alert messages, the next step would be to see if the heating equipment actually turns on.
- Replace or Recharge the Batteries. After you make sure the issue isn't within the app or your Wi-Fi network, make sure to kick off the troubleshooting process with a fresh set of batteries.
- Nest not turning on heat. First, let’s check the circuit breakers to see if any switches have tripped. If you’re using a heat pump, try increasing the temperature setting and see if the outside unit kicks in.
- Nest not cooling to set temperature. If your Nest thermostat is not cooling your home to the set temperature, there are a few troubleshooting steps you can try.
- Nest thermostat off but heating on. If you’re finding that your Nest thermostat is off but the heating system is still running, there are a few potential causes to consider.
- Nest thermostat keeps turning AC on and off. If your Nest thermostat is causing your AC to turn on and off rapidly (short cycling), there are a few potential causes to investigate.
- (4)
- Licensed Appliance Repair Expert
- adriansimmons@funktionalhome.com
- WiFi connectivity problem. As you probably already know, your Nest thermostat requires WiFi to be able to get information about the weather in your area.
- Temperature extremes. While your smart thermostat should have a set safety temperature and never reach temperature extremes, in the event of a broken or missing C wire, the system may not be able to start the cooling system.
- Faulty sensors. As we’ve mentioned in the beginning, your Nest thermostat includes a number of sensors that the Nest sense system relies on. In case any of these sensors is malfunctioning or damaged, this will affect all the functions of your thermostat, including cold air and heating.
- Improper wiring. A lot of the time, the main issue with your cooling system lies in the thermostat wiring. This is precisely why it is recommended to label the wires when installing your thermostat so you know exactly what could be the issue in situations like this.
Aug 7, 2023 · In this article, we will explore some of the common issues faced by Nest thermostat users and provide step-by-step guides to troubleshoot and resolve them, ensuring you get the most out of your smart thermostat.
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Restart or reset a Nest thermostat. A thermostat restart can fix some common issues. Reset your thermostat to clear your personal settings. If you need further help, or find a restart doesn’t...
