Nest Thermostat takes long to heat up

[Tutuyan]

I recently changed my AC unit a few days ago and the new unit is supposed to be more powerful and efficient. With the old AC unit Nest thermostat used to reach a desired temperature a lot faster. For example to reach 73f it used to show 10 minutes, but with the new unit it shows 1 hour 30 minutes. What could be the issue.

[zoeuvre]

Hi Tutuyan, 

Yikes! When you replace your AC unit and notice that your Nest Thermostat takes longer to reach the desired temperature, there could be a few factors at play. Here are some potential causes and troubleshooting steps to consider:

1. Although the new AC unit is more powerful and efficient overall, it's possible that it has a different cooling capacity compared to the old unit. If the new unit has a higher capacity, it may take longer to reach the desired temperature because it is designed to cool a larger space. What is the make and model of your AC so I can take a closer look?
2. The settings and configuration of the new AC unit may be different from the old one. It's worth checking the AC unit's configuration to ensure it is set up correctly. Verify that the fan speed, temperature differentials, and other relevant settings are properly adjusted for optimal performance.
3. Assess the airflow in your home and the condition of your ductwork. If there are restrictions or blockages in the ducts, it can impede the airflow and slow down the cooling process. Ensure that the vents are open and unobstructed, and consider having a professional inspect the ductwork to ensure it's in good condition.
4. Double-check the settings on your Nest Thermostat to make sure they are properly configured. Ensure that the desired temperature and other relevant settings are accurately set. It's also worth reviewing the schedule and temperature setbacks to ensure they align with your comfort preferences.
5. Verify that the temperature readings on your Nest Thermostat are accurate. You can use a separate thermometer to check the temperature in the room and compare it with what the thermostat displays. If there is a significant discrepancy, you may need to recalibrate or adjust the thermostat's temperature readings.
6. It's also possible that the new AC unit may require some time to settle and optimize its performance. New units may have different operating characteristics or may need to undergo a break-in period before reaching peak efficiency.

Let us know if that helps.

Best,

Zoe