Nest Thermostat Goes Into Delay? (Possible Causes & Fixes)

Nest Thermostat Goes Into Delay

They say that patience is a virtue, and when it comes to thermostats, this is usually the case. Once in a while, your Nest thermostat might show a delay in the cycles. At times, this is pretty normal. However, there is a certain moment where you have to realize that you keep getting weird delays. What can you do to speed things alone?

Nest thermostats will go into delay when they are working on keeping your home a certain temperature. However, this can also be a sign that your thermostat isn’t getting enough power to accurately and quickly change the temperature of your home. 

This can be pretty annoying when you’re just trying to make your home comfortable. Here’s what you should know about this surprisingly common problem.

Is Your Thermostat Supposed To Go Into A Delay?

The first thing that you need to be aware of is that your thermostat is going to work in cycles. Nest has delays when a cycle hasn’t quite finished. Cycles, in this case, are defined by set amounts of time that your furnace or AC unit should be turned on.

In other words, your thermostat should tell your furnace, “Hey, you need to run for five minutes.” Then, it’d turn off. If you want to cool down your home during those five minutes, you might see your thermostat issue out a delay. This is your Nest’s way of saying, “Hey, let this finish first!”

However, it obviously shouldn’t be fixed on a delay.

Why Is My Nest Thermostat Stuck On Delay?

Most of the time, a “stuck” thermostat gets stuck because of a lack of energy. Low battery and energy levels will make your system run slow. At times, it can also interfere with how well your thermostat can send signals to both your heater and cooling system.

If your thermostat is low on energy, one of the things it could do is get stuck on delay. This is because it simply does not have the juice necessary to actively send signals.

Why Doesn’t My Nest Thermostat Have Enough Power?

Nest thermostats are somewhat unique in the way that they work. Thermostats from this company get energy when they run the furnace or the AC unit. (They contain a rechargeable lithium-ion battery that charges up passively when you use the system.)

If you don’t really use your HVAC system as frequently as others would, you may end up causing a lag in how much energy your thermostat has. It leaks away while your Nest stays on.

Could It Be An Electrical Wiring Issue?

The long and short of this is, yes, it could be a wiring issue that deals with frayed wires in your home. However, this is rarely ever the case. If you go through this entire tutorial and still have issues, then you may have to call an HVAC professional or electrician. With that said, you should not assume this is the problem right off the bat.

How To Fix A Nest Thermostat Stuck On Delays

Now that you know that it’s a power thing, it’s time to take a look at how you can fix things. Surprisingly, it can be easier than you think.

Should I Replace My Nest Thermostat Batteries?

Generally speaking, you should always try to keep your Nest’s batteries charged up. In most cases, you will get alerts saying that you need to replace your batteries straight to your Nest app. Heck, you can even look at the light on your Nest device to see if that’s an issue.

If you notice that your thermostat is stuck on delays, it’s worth trying to replace your batteries. It can potentially help your situation. Along with the rechargeable battery that is inside the Nest, you also will need to power it through the use of two AAA batteries.

Should I Charge My Nest?

Yes, you should! You can do so by removing your Nest from your wall and charging it via the USB port on the back of the thermostat. Once it’s charged, you should see an improvement in the overall functionality of your thermostat.

How Else Can You Reduce Delays In Your Nest Thermostat?

The other way to reduce delays in your Nest thermostat is to look at your C-wire. Many setups will require a C-wire regardless, but some won’t. If your setup does not involve a C-wire, it might be time to consider adding one. C-wires are there to help provide a constant flow of electricity to your thermostat.

Adding a third wire to your thermostat setup can seem daunting, but it’s actually pretty easy. You can make this happen using a C-wire adapter kit. You can get one from Vendstar, if you’re interested.

Should You Consider Getting Another Thermostat?

If you do not have a C-wire and don’t want to use a kit to adapt your Nest to a C-wire setup, I totally understand. It’s a bit of work, and most of us just want to keep things as they are. Unfortunately, Nest thermostats are all made to function best with the use of a C-wire. If you don’t have one, you’re going to eventually have delays.

Another option that you can consider doing involves replacing your Nest thermostat with another model that’s geared towards setups that don’t contain a C-wire. Some of the most popular ones can be found from ecobee, Amazon’s brand of thermostats.

Should You Replace Your Nest Thermostat?

In most cases, there’s no reason to replace your thermostat unless you want to. With that said, you might want to do it if any of the following issues are true:

  • You have tried everything above, but still find yourself stuck with delays. If this happens, there is a chance that you may have a defective thermostat. You may want to call Nest to see if there is anything else you can do before you assume that you need to replace it. Besides, they may end up offering you a replacement if it’s relatively new.
  • You want to get a thermostat for a system that doesn’t have a C-wire. I can’t blame you for this one. Sometimes, it just feels like the smarter thing to do.
  • It’s been years since you have bought your thermostat and you want a new one. Sometimes, people just end up having a moment where they are like, “I’m done with this thing.” If you just want a new thermostat, it’s totally fine to have this as an excuse to go shopping. (I won’t tell.)
  • Delayed thermostat readings aren’t the only thing that you have wrong with your Nest. I’ll admit. This is unusual since Nest is the gold standard as far as thermostats go. However, it can still happen. Even the best manufacturers will have flukes. Once again, I strongly suggest you call Nest in this situation as they are usually able to fix things easily.

Should You Call An HVAC Professional?

HVAC professionals are generally best used for moments where you believe there is something wrong with your furnace, or AC unit. In most cases, professionals will just tell you that you should just replace your thermostat. However, there is a limit to how often you will get that advice.

People who feel like there may be something else causing the delays might want to get a diagnostic done on their HVAC system. If you choose to call a professional for a check-up, you should expect to pay between $60 to $100 for a diagnostic fee. Any repairs they quote you will be extra.

If the problem is strictly with your Nest thermostat, you should not try to call an HVAC team. Rather, you should give the company a call. They are usually pretty good with their customer service and will be able to walk you through a troubleshoot that should fix most problems.

Related Questions

How long does it take a Nest thermostat to charge via USB port?

If you want to recharge your lithium-ion battery through the use of a USB port, then you are going to have to wait a while. A Nest battery will take 2 hours to fully charge via a USB port. With that said, most people charge their thermostat before it fully runs out of battery power. So, it probably won’t be a full two hours in your case.

Can Nest thermostats cause short cycling?

Nest thermostats, like any other thermostats, can cause short cycling in your furnace if your batteries no longer have enough voltage. The best way to avoid short cycling is to keep your batteries (and the rest of your system) well charged. Even when voltage runs low, you shouldn’t expect your Nest to short cycle. It’s still a rare-ish effect.

How long is Nest’s warranty supposed to be?

Nest devices generally come with a two-year limited warranty on their parts and manufacturing. However, if you want to, you can also get a warranty extension of up to three years on select Nest devices. This costs an additional amount of money.

Ossiana Tepfenhart

Ossiana Tepfenhart is an expert writer, focusing on interior design and general home tips. Writing is her life, and it's what she does best. Her interests include art and real estate investments.

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