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- First reviewNovember 27, 2015
- Last reviewNovember 27, 2015
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Nest 3rd Generation Smart Learning Thermostat: Take control of your home's heating and cooling without lifting a finger with this thermostat, which learns your habits and adjusts to automatically regulate your home's temperature based on your schedule. The Nest Leaf feature alerts you when you choose a temperature that's energy efficient.
Posted by: Leon
Bought the Nest about two weeks ago. Installation was easy. It all went well for about a week, then it started throwing the "E74" code - no power to Rh. I called technical support and we went through an extended (60 minutes) trouble shooting process, swapping almost every connection, to isolate the issue determine if something was wrong with my (3 month old) HVAC system... Off course everything was fine with my AC/Heating system. During troubleshooting, the Nest magically started working again. We were puzzled why it stopped working, and equally puzzled why it started working. Anyway, technical support (very nice but puzzled guy) claimed it must have been a loose connection.
A day later, my wife called to say the issue had resurfaced with the Nest. So while heading back home from work, I called ahead to Nest technical support, because is does take some time to get them. Upon reaching home, with Nest now on the phone, the system began working (without us starting the troubleshooting). The tech support lady claimed there might be a small break in one of my wires, which i didn't necessarily agree with because why then would it work intermittently?
The next day, while out, the dreaded E74 issue came back again and showed on my wife's phone. When we got home i got my multimeter to test the power to the wires, and everything was fine with the wires. Put the Nest back on, and it showed no power. Obviously something was wrong on the Nest end. We called Nest again and another technical support staff (sounded like he was half asleep) wanted to walk me through the same 45 minute procedure we went through the first time to try and check to see if my heating system was working or my house had a wiring issue. I asked him if he read the history; he went back, started reading, then came back wanting to do the same thing - play musical chair with the wires.
I got frustrated, my two year old was getting cold, so I went back for my old thermostat (Nest tech support, did tell me not to toss it just yet)...and I reinstalled it. My heat worked immediately - and no issue with power to wires. I have had continuous heat since then.
I am guessing the Nest unit was messing up - but it didnt seem as if Nest wanted to accept that this is the case; they ....OR nest has compatibility issues with heating systems that uses high efficiency variable blower speeds or staged heating (although they say it accommodate up to three stage systems.
Again...its good when it worked. Maybe it needs a bit more work.
No, I would not recommend this to a friend.
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