Why Your Nest Thermostat Isn't Working and How to Repair It

April 13, 2021

The Nest thermostat is one of the top-selling smart thermostats you can get. And for good reason. It picks up on your temperature preferences and makes an energy-efficient schedule to match. And by geofencing with your phone, the Nest Learning Thermostat and Nest E are aware of when you’re at your home or away and can change settings to help you save even more.

The Nest works with a wide range of 24-volt heating and cooling systems, but it’s always a wise idea to visit the Nest thermostat compatibility checker before getting one. Don’t forget to contact your energy supplier for valuable rebates, as you might be able to get a Nest for free or close to it.

Once you’ve confirmed it’s compatible, you can either hook it up yourself or contact a HVAC pro like Precision Mechanical. If you’re putting it in yourself, you’ll notice a terminal for the C-wire, or common wire. This wire is solely used for powering your thermostat. If your residence or HVAC system is older, you might not have one of these wires. In the majority of cases, Nest says this isn’t a setback as the thermostat can draw enough power from other heating and cooling wires.

In some cases, your heating and cooling system might require that C-wire. And here’s why.

Why Your Nest Keeps Losing Power and Other Problems

The Google Nest Thermostat is a step up from aging programmable thermostats that use a combination of wiring and AA batteries for power. It uses a rechargeable lithium-ion battery and wiring to sync with Wi-Fi, power its digital display and run your heating and cooling system.

8 Common Nest Thermostat Problems

If it can’t receive adequate power, Nest says you could have some of these problems:

  1. Bad battery life.
  2. Thermostat motion sensing won’t operate.
  3. Your thermostat sometimes disconnects from Wi-Fi.
  4. Your system abruptly turns on or off, or won’t shut off.
  5. Your system is making odd noises, such as chattering, stuttering, clicking or thumping.
  6. Heating or cooling is short cycling, or constantly turning on and off in a short period of time.
  7. There is a delay notification on your Nest thermostat’s screen, along the lines of “heating is delayed for 2:30 minutes.”
  8. The system fan is constantly running, won’t turn on or turns off and on repeatedly in a short period of time.

You might worry something is up with your heating and cooling system, but if you just got the Nest, it’s best to check your thermostat right away. This is especially pertinent if the weather is mild, and you haven’t been running your heat or air conditioning frequently.

Our Pros Can Solve Nest Thermostat Problems

If you’ve attempted Nest thermostat troubleshooting by yourself but can’t solve the problem, a smart thermostat professional such as one from Precision Mechanical can help. We can determine the problem and install a C-wire, if necessary.

Smart thermostats including the Nest are made to make your life more convenient, through automatic energy-efficient programming and the option to keep an eye on temperatures while you’re on the go. It’s an annoying experience when yours won’t run like it should, but our heating and cooling experts at Precision Mechanical can fix the issue fast.

If you’re experiencing strange heating and cooling behavior with your new Nest, reach out to us at 605-206-3766 to set up your appointment now.