My Nest displays a higher temperature than actual when connected to network.

[cfjwang]

I started a thread two weeks ago about the wrong temperature display on my Nest which is about 7 degrees higher than actual.   I had to raise the target temperature by 7 degrees to keep the house warm.

 I subsequently purchased a used Nest to avoid rewiring and had it installed.  It worked "normally", i.e., the displayed temperature agreed with the actual.  

But after Wi-Fi set up and network connection, the same old problem came back. 

I disconnected Wi-Fi and had it off the network, the problem persists.  Now it behaves like my original Nest. 

Is it possible that there is memory somewhere outside my hardware (the two Nests)?

[EdwardT]

Hi cfjwang,

Thanks for reaching out. I'm sorry to hear that you're having an issue with your Nest Thermostat. I'd love to know more about this and I have a few questions:

• How big is the difference between the readout of the Nest thermostat and your thermometer or other thermostats?
• Is your Nest Thermostat getting direct sunlight?
• Is your Nest Thermostat near any heat source?

Looking forward to your response.

Thanks,

Edward

[cfjwang]

Thanks for the follow up. The difference is about 8 degrees. It is not under direct sunlight. It is not near any heat source.  FYI it has been working properly for years until a few weeks ago. 

[EdwardT]

Hi cfjwang,

Thanks for the response. We'd like to know more about this. Please fill out this form so we could investigate further.

Thanks,

Edward

[EdwardT]

Hi cfjwang,

We got your form — thanks for filling it out. Our team will reach out to you via email to further assist you. Also, please be advised that this thread will be locked after 24 hours.
 

Thanks,

Edward

[cfjwang]

Does that mean nobody can help me except you guys now?  You guys terminated my last thread as soon as I indicated a possibility that Google is controlling my Nest.  Two independent Nest developed the same behavior after they are connected to Internet.  Are you going to make this reply disappear too?

[cfjwang]

I have been thinking about migrating to Nest Generation 3, as soon as I can confirm that my Generation 2 is indeed defective (two in a roll, from independent source?).  But if my problem is caused by something other than the hardware, then I will stay away from Google hardware whenever possible.

[EdwardT]

Hi cfjwang,

Thanks for the response. Our team sent you an email. Let's continue our conversation there as there are details that we need that we can't share here.

Thanks,

Edward

[cfjwang]

Haven't seen any email yet.  

[EdwardT]

Hi cfjwang,

Thanks for letting us know. I checked your case and it appears that our team already sent you an email. Let's continue our conversation there as we would need some information that we cannot share here.

Thanks,

Edward

[Jhonleanmel]

Hi folks,

Chiming in to see if you still need assistance with this. Let us know if you have additional questions ― we'd love to help.

Best,
Mel

[cfjwang]

Just keep the thread in case other community member can help.

I have pursued all hypotheses including replacing the battery (hypothesis : local heating from old battery with higher internal resistance).  But the problem remains.  There is only one remaining hypothesis that I cannot investigate.  That is, something is pushed to the Nest hardware from the cloud and stays there.   I suspect this because

1.  I purchased a used Nest.

2. It worked just fine until I had it connected to W-Fi.

3. Then it behaved just like my original Nest.

4. Now I have two behaving exactly the same way.

[Jhonleanmel]

Hi cfjwang,

Thanks for getting back to us.

I suggest replying to the email sent by our senior support team so they can provide one-on-one help with you and your devices. 

Best,

Mel

[cfjwang]

I have been doing that and no real progress so far.

[Jhonleanmel]

Hi cfjwang,

I'm sorry for the delay. I've sent a follow up with the team handling your case. They should be reaching out to you shortly.

Thanks for your patience.

Best,

Mel

[Jhonleanmel]

Hey cfjwang,

Checking back in should you still have some questions here. Let us know by replying to this thread. I also checked your case and our senior support team is waiting for your reply.

Best, 
Mel

[cfjwang]

The problem remains after having attempted all suggested solutions.

[Jenelyn_O]

Hi cfjwang,

I saw your post and wanted to chime in. I'm sorry for the delay. Please let  me know if you still need assistance as I'll be willing to assist you from here.

Thanks @Jhonleanmel for your help.

Best,

Jenelyn

[cfjwang]

Just leave this thread open.  I am hoping someone with similar experience/solution can help.