Nest E thermostat +2hrs to cool and never reaches temp

[Slane1969]

Our Nest is approx 3 years old and heating worked fine. We just used air con for the first time this year and house is not cooling down quickly. When I try to

lower the temp even by one degree I get 2+ hours message and the app will briefly show Delayed?

we have the c wire fitted and everything worked well for the last three years until now. Any suggestions?

[CoolingWizard]

The nest learning thermostat uses the performance of your HVAC system overtime to make the determination an estimation on how long it will cool based on the outdoor ambient temperature. If your cooling system is not cooling properly, you possibly need to have the system checked. Verify that the filter is clean, and if you can get to your air handler, you should feel the refrigerant, copper lines. The little one should be hot, and the big one should be cool. If it’s not, you need to call the service company. 

AC Cooling Wizard

[Slane1969]

Checked one is hot and one is cold.

[CoolingWizard]

OK that sounds pretty good. The Hot liquid line should be about 130 to 150°. The air coming out should be about 18° to 20° colder than the air going in.  The best place to check is the nearest vent to the air handler. 

AC Cooling Wizard

[Slane1969]

Addition to nest we have a Honeywell wifi thermostat for upstairs - this is working fine and upstairs is cooling to the temp set. I believe it’s either the Nest or a setting - it’s been saying 2+ hrs for days now

[CoolingWizard]

Ok, what is the current reported ambient room temperature and what is your setpoint that you’re trying to cool it to?

Ac Cooling Wizard

[Slane1969]

It’s 74 and if I try to push it down to 73 or 72 it says 2+ hrs and doesn’t change the temperature it remains on 74.

[Solocin]

I have the same issue!

[CoolingWizard]

What people need to understand is the Nest Learning Thermostat learns over  time how well your HVAC system is working as it cools or heats. It uses Google Weather to get the outdoor ambient temperatures, and monitors your system as it heats or cools.  Over time it becomes more accurate. Additionally once a baseline is established, it can sense when your system is performing outside it norms and alerts you to the possible need for service.  

For the hundreds of customers I have installed the Nest Thermostat I always explain that the Nest learns over the course of 1 year it will have amassed enough data to be very accurate. As for my approach,  I also go the extra step to teach them and even help them to set up their heating and cooling schedules. 

AC Cooling Wizard

[Jenelyn_O]

Hi folks,

Thanks for reaching out. I'm sorry for the delay. I hope you already get the answer you're looking for. Please let us know if you still have questions or concerns, as we'll be willing to assist you further.

I appreciate your help, @CoolingWizard.

Best,

Jenelyn

[Slane1969]

Still have 2+ hrs showing anytime I try to adjust the thermostat. Air con is working fine upstairs using Honeywell thermostat over wifi. 

[Markjosephp]

Hello everyone,

I wanted to stop by and see how I could help.

Thanks for your assistance here, Jenelyn.

@Slane1969, thanks for letting us know. As your thermostat simply regulates your system, it looks that the system isn't effective enough to reach the desired temperature, which usually explains the message delay. It usually shows when attempting to activate the machine. Could you perhaps help me with the power readings on your thermostat? For the Nest Learning Thermostat or the Nest Thermostat 2020 model, you may find them in the Technical Info or Nest Thermostat E and Equipment Settings sections, respectively.

I'll look forward to your response.

Regards,

Mark

[Markjosephp]

Hi Slane1969,

I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.

Thanks,

Mark

[Markjosephp]

Hey folks,

It has been a few days since your last replies, and we're going to lock the thread within 24 hours. If you have any questions, please feel free to create a new post.

Thanks,

Mark