Why is my Nest not showing air conditioning?

The reason your Nest thermostat is not cooling is because you incorrectly labeled your wiring according to the “Conventional” side of your old thermostat, instead of using the “Heat Pump” side. To fix this, relabel the wiring from your old thermostat setup using the Heat Pump side and rewire your Nest accordingly.

How do I fix Nest error E74?

How do I fix Nest error E74? Check and repair loose connections on your Nest thermostat to fix an E74 error or no power to the Rh wire issue. If it renders ineffective, clear up the drain pipes and check if the connected condensate pump is clogged. Get it cleaned, and it should fix the issue.

What do I do if my Nest isn’t cooling?





Nest not cooling to set temperature – 7 causes & fixes

  1. Getting to know your system. …
  2. Re-labeling your Nest thermostat wires. …
  3. Rewiring your Nest thermostat. …
  4. Take a look at your circuit breaker. …
  5. Put the “red wire” in place. …
  6. Search for a damaged fuse. …
  7. Restart the thermostat. …
  8. Update the thermostat.

How do I know if my Nest thermostat is bad?

8 Common Nest Thermostat Problems

  1. Bad battery life.
  2. Thermostat motion sensing won’t work.
  3. Your thermostat occasionally disconnects from Wi-Fi.
  4. Your system suddenly turns on or off, or won’t turn off.
  5. Your system is making strange noises, including chattering, stuttering, clicking or thumping.

Why is my Nest blowing cold air instead of heat?

If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when its in Cool mode), change the settings for orientation of your heat pump.

Why does my Nest thermostat say in 2 hours to heat?

Whenever you get the “In 2+ Hours” message on your Nest Thermostat, it means that your Thermostat is slowed down for cooling your home. It usually occurs when the current room temperature is at a certain level, but you are trying to change that temperature to a comfortable temperature for your home.

Why is my Nest not heating up?





You first need to make sure that your thermostat is not defective. Turn off power to your furnace, then join together the Rh and W wires (take them out of the nest wire plate and join them with a small wire nut or just twist them together), power back your furnace and check if your zone is working properly.

Why would Nest stop working?

There’s a problem with your system and it may need maintenance for a variety of reasons. For example, a clogged air filter can cause your system to overheat and automatically shut off. When this happens, your Nest thermostat can’t draw power from your system to charge its battery.

What is the lifespan of a Nest thermostat?

The average lifespan of a Nest Thermostat is about 10 years, there are still times when your Nest thermostat can go bad.

Is there a battery in my Nest thermostat?

The Nest Thermostat receives power from your HVAC system. It also uses 2 AAA alkaline batteries as a backup, or to supplement if your system can’t deliver enough power.

Why does my Nest battery keep dying?



This will typically be down to the lack of a C-wire or an issue with the voltage coming from the Rh or Rc wire on your HVAC unit. Check to see if your HVAC unit has power and if the breaker has tripped or a fuse has blown.

When should I replace my Nest thermostat?

A Nest Thermostat should last for at least 10 years.

How often does Nest need to be charged?

The Nest thermostat rarely needs to be charged. If your Nest thermostat is wired to your home, it doesn’t need recharging. If your power goes out, your Nest thermostat will work for two hours. Depending on your model, it can be recharged, or the batteries need to be replaced.

How can I tell if my Nest is charging?



A blinking light on the front of your thermostat confirms that it’s charging. The color of the light will depend on the battery level of the thermostat when you charge it. Usually, your thermostat will take about half an hour to recharge. But if the battery is fully drained, it can take as long as 2 hours to recharge.