• 1.0 out of 5 stars

    Issues with backplates can show up any time

    • Written by from Chagrin Falls

    I purchased my second generation Nest in November 2012. I enjoyed 10 months of efficient use and loved the product, until one night in August while running in cooling mode, it started making a simultaneous call for heat and caused my HVAC system to go completely haywire. Emergency HVAC calls and $700 later it was determined it was determined the Nest had gone bad. At that point Nest didn't tell me about the significant number of issues with backplates that had been cropping up -- I got a replacement that also failed. This time it started running my air conditioning in heating mode when it was 30 degrees out. My third backplate also went bad. The problem seems to stem from Nest's use of FETs which makes it highly intolerant of normal voltage swings found in HVAC units. The nightmare of trying to get Nest to refund my purchase for this sudden incompatibility has been painful -- more than 4 hours of waiting with tech support. The Nest is a great idea, but the company is showing real issues with product quality, reliability and support that needs to be addressed.

    53 of 55 people found this useful

  • 1.0 out of 5 stars

    Love the idea, but product is faulty

    • Written by from Phoenix

    Bottom line - great idea, but they just don't work. After spending $200 for an "Authorized NEST Installer" to install them - the installer told me that they have nothing but trouble with these products and they recommend the equivalent honeywell products instead.

    Here is the whole story if you're interested in the details (I am very technically proficient with HVAC systems):


    Bought three of them. Installation was a breeze, and everything was very well thought out and explained. Then....after about 3 weeks.....the NEST's stated that they needed to be charged! Made no sense to me. They reported a VOC input voltage of 5.03 volts, but I measured 24 volts with my voltmeter. Tech support was WAY LESS knowledgeable than I was about the product, so I gave up. Called an "Authorized NEST installer".....who told me to not bother with the NEST - but I don't like to give up that easily. So we checked everything and installed new transformers on the furnaces, etc. THEN - EVERYTHING WORKED! Until 2 days later when the NEST's reported that there was no power to Rc. The "Authorized NEST installer" sighed and then came over again to install a resistor between C and W......which worked! Until 1 more day when the NESTS again reported no voltage at Rh. Again, I confirmed that there was 24v with no problems.

    NEST tech support was very friendly, but I really get the impression that a lot of people are having similar trouble to what I had. Tech support finally recommended that I return the product for a refund. Interestingly, I could hear a lot of the background conversations while on with tech support - and it sounded as if a lot of people are having similar trouble. In a cold country - you CAN'T have a bad thermostat.....these products probably need to be recalled if they don't come up with an appropriate software update for them.

    This is too bad - wonderful idea with a total miss on application. These NEST thermostats should be a case study in an Engineering textbook on how NOT to deliver a product to the consumer.

    46 of 50 people found this useful

  • 1.0 out of 5 stars

    Stopped working

    • Written by from ABINGTON

    I bought the Nest about 6 months ago and had it professionally installed along with a brand new HVAC system. It worked fine until about a week ago went it got cold outside. The Nest had both the heat and the AC running at the same time. I had to go out and pull the breaker to the AC unit. I had the HVAC company come out today and take a look at it. The confirmed that the nest was sending the signal to the AC unit to turn on. They could not do anything about besides leave the breaker pulled. The other option is to remove the nest and replace with another controller (not a nest). I will now try calling Nest to see what they will do. I am clearly experiencing what is happening to a lot of people. Will be interesting to see how Nest handles it. Makes me mad because I really like the way the nest looked and functioned but clearly this is a huge problem that will most likely have me throwing the nest in the trash.

    45 of 49 people found this useful

  • 1.0 out of 5 stars

    Horrible time with Nest...

    • Written by from highland beach

    I picked up two Nest thermostats last week. One is working fine, the other not so much. My AC units in the home are all the same. I sent in pictures of my thermostat was told I was good to go, etc...

    At this point I have returned 4 units... I was told each time my terminal (the thing the wires plug into that mounts to the wall) had a bad "G" connection N26 error and to return it for a replacement. I was finally told that small voltage spikes can kill the base unit/terminal and cause it to need replacing, a common issue?? Seems odd that a $20 20 year old thermostat can take it but the $250 Nest can't?

    I then was told my system is incompatible?? But its working fine on the other one with the same AC model unit... Makes no sense.

    I then call in my AC guy and spend $200+ on some troubleshooting to be told the same thing about bad base unit/terminal / voltage spikes replaced the base again 4th time and it worked for about 8 hours. I wake up at 3am hot the fan is not running ac is frozen... Check the wiring under equipment on the nest and guess what!? "G" connection N26 error like every-other time. No solution given when I called this morning.

    I then called concerned about my working unit, will it go down so easily with a small spike?

    I was given no solution and told to return all of the units if I was really concerned... FAIL. I will not be recommending the Nest thermostat to anyone regardless of their experience with technology or AC units.

    39 of 42 people found this useful

  • 1.0 out of 5 stars

    One of my two Nest thermostats has suddenly stopped controlling its furnace

    • Written by from Merrickville

    After two months of apparently working as advertised, one of my two Nest thermostats quit controlling its furnace this evening.

    It was set at 18 Celsius, but the furnace just kept running and running: 19 degrees, 20 degrees, 21 degrees, 22 degrees. I could control the thermostat from my iPad and iPhone, but it did not control the furnace. I turned the thermostat completely off, the furnace still kept running.

    No one answering the phones at a Nest support in the middle of the night.

    So I've turned the furnace completely off. At -2 outside, that's not a great plan, but nothing else to do.

    36 of 43 people found this useful

  • 1.0 out of 5 stars

    Update killed thermostat.

    • Written by from Woburn

    Newest update causes the battery to run down and shut down. In the cold north east no thermostat is a big concern, but not to Nest. With no battery you can not even manually turn on your heat!!!! Frozen pipes while you are on vaca? Elderly in the house? They claim to have a fix but upon calling they admitted they can't even roll back to a working version.

    30 of 34 people found this useful

  • 1.0 out of 5 stars

    Do not buy a Nest

    • Written by from Mississauga

    The Nest is not reliable. We installed ours 2 wks ago and it does not work - we are presently freezing in our home. Yesterday, we came home from work as usual and it was mysteriously in "away" mode. Today, we came home and it had the air conditioner and furnace running at same time. The house was freezing. We turned off the air conditioner at the electrical panel - we tried to do it at the Nest but it did not work, so the only option was to flip the breaker. We then put a thermometer beside the Nest and saw that it reads 8 degrees less than is displayed on the Nest, meaning that the Nest does not properly measure the ambient temp. We went to their website for troubleshooting - it is a useless piece of fluff. We called their 1-800 # and did not get service after almost an hour on hold. So, here we sit, freezing and disappointed, in our house in November! We will return to Honeywell asap. Do not get a Nest!

    31 of 37 people found this useful

  • 1.0 out of 5 stars

    FAIL

    • Written by from Oakville

    Don't be fooled by the shiny, sleek look. This this is an epic fail that can cost you hundreds of thousands of dollars if you live in a cold climate. This is an expensive consumer electronic device and NOT an HVAC device. The customer support is non existent apple-like "geniuses" who are totally untrained for the problems this thing generates
    I had constant stop WiFi connectivity issues and several losses of power to the furnace and AC and low battery warnings.
    I lost count of how many times I came home to a boiling or freezing house
    One day, It failed on a nasty cold snap and my water pipes froze, my basement flooded with cold frozen water and destroyed my finished basement and everything in it.
    The HVAC guy said it was the nest. He refuses to sell them because of the constant problems that can easily become catastrophic.
    Don't be an idiot like me. READ THE REVIEWS and stay away!!

    Buy a cheap honeywell or something that is designed as a real thermostat. The aren't shiny, but they work. This POS does NOT!

    24 of 26 people found this useful

  • 1.0 out of 5 stars

    Nice Idea but Bad Product

    • Written by from Hopkinton

    Same as the previous review I woke up one morning during the recent cold snap to the downstairs (where the Nest T-stat was located) being in the 40's and found that the Nest thermostat had stopped communicating with my furnace. To be clear both other zones in my house were working so it was clearly a problem with the Nest. After disconnecting it and rechecking the wiring (which was fine) the unit was reinstalled and it worked again. Two nights later the same thing happened again. After a quick internet search I found that this a problem with the Nest on some types of HVAC systems. Once I installed the old (non-Nest) thermostat everything worked as it should. Do yourself a favor and stay away from this product.

    20 of 21 people found this useful

  • 1.0 out of 5 stars

    Nest is Junk

    • Written by from Minnetonka

    Woke up one morning freezing and found that the Nest "learning" thermostat had stopped communicating with my furnace. Tried to turn the heat up and received a low battery message. Called support and they assured me that after charging the thing with a phone charger that it would work again. Temps went to -15 in MN and I woke to a temp of 49 degrees inside my house. Called customer service again and spent over an hour trying to correct issue until they decided it was time to send me a warranty replacement. It took over 3 days for this to arrive and the customer service rep told me that I should go to the hardware store and purchase a traditional thermostat if I hadn't saved my old one to keep my pipes from freezing in my home! Warranty replacement still does not work, I've spent way more on electric bills to run space heaters while the furnace was out, missed a day of work to install emergency thermostat so my pipes wouldn't freeze, I have an 11 year old son who couldn't sleep on a school night because it was bitterly cold in our house, spent hours on the phone with nest "technicians" . Do yourself a favor and buy a normal thermostat, I wish I would have.

    21 of 26 people found this useful

  • 1.0 out of 5 stars

    The Nest - Problem after problem

    • Written by from Wayne

    The Nest upgrade to v 3.5.1 (7.1.13) software has created massive connectivity issues (failures) for me (Apple Routers) and others. See Nest community form. Very disappointing product.

    19 of 22 people found this useful

  • 1.0 out of 5 stars

    Total POS

    • Written by from Alton

    These things are horrible. I have spent hundreds of dollars on HVAC repairs that always end up being the mystery "low battery" phenomenon. I am about to remove all 6 units and replace with Honeywell stats. Oh, they are very pretty but that is all they are.

    15 of 17 people found this useful

  • 1.0 out of 5 stars

    Too much trouble - energy cost increased.

    • Written by from Loveland

    First off, I'm very tech savvy, over 20 years in electronics design and software engineering, so I'm capable of following basic installation instructions. I was quite interested in the Nest thermostat. My house is heated and cooled by a newer heat pump. I dutifully took a digital photo of the connections to my old thermostat and sent them to Nest. When i called, I was assured that the 2nd generation thermostat would work fine with my system. Nest even sent me an email with wiring instructions. This would be a snap, I thought.

    All seemed fine at first. Then, during a twice-yearly HVAC service, the tech asked me why I had the emergency heat on all the time the unit was running. I was puzzled. He showed me that it was indeed running on emergency heat. After a couple of calls to Nest tech support, I gave up, reinstalled the original thermostat, and returned the Nest for a refund. Then - insult to injury - I received an electric bill that was nearly 3x normal - emergency heat is expensive! I could have bought 2 more Nests with the additional energy cost. By the way I checked, double checked, and confirmed with Nest support that everything was wired and configured correctly.

    Not a happy outcome.

    15 of 17 people found this useful

  • 1.0 out of 5 stars

    Does not work in cold weather

    • Written by from Hanover

    I have had HVAC technician talk twice with NEST to get it to operate correctly. In single digit weather the system would only blow cold air. Change system back to Honeywell thermostat and house is warm. Also, does not work with changeable fan speed system. I gave it a year to learn but to no avail.

    16 of 19 people found this useful

  • 1.0 out of 5 stars

    Does not work!

    • Written by from Gloucester

    After purchasing the Nest thermostat at my local Apple store (along with $2,500 worth of computers), I installed the Nest in my vacation condo so I could turn up the heat before arriving after a prolonged absence. Three days after I left, the wifi quit. On returning to my cold condo, I installed a new router. A few days later over the holidays, the Nest wifi controll quit with a "low battery" warning. (The router is not the problem.) With sub-zero temps outside, the Nest defaults to a dumb thermostat...a very expensive dumb thermostat. At -8 degrees F, can it be trusted to keep the pipes from freezing? Bottom line: easy to install, very pretty, doesn't work. (Apple: warn your customers!)

    18 of 24 people found this useful

  • 1.0 out of 5 stars

    Wish It Was 5 Stars But It's Only 1 Star

    • Written by from Greely

    I was so excited to order this product when the gen 2 first came out - the concept is great and the user interface is wonderful. Unfortunately the build quality Is so poor that everything else doesn't matter.
    When my heating / cooling contractor installed it for me (I have a ground source heat pump so Nest recommended a pro install) a year and a half ago - it was his first experience with it and he was impressed but not as quick to convert as I had been.
    Just to be sure everything was good - my contractor talked to the Nest support group when first connecting and everything went well.
    Suddenly 6 months later in the middle of the winter - the thermostat started sending a cooling request at the same time as a heating request to my heat pump which left me with only air conditioning on a very cold day. Even after changing the mode to heating only it continued to send cooling requests.
    My contractor came out and after conferring with Nest support for about an hour, they finally agreed it was a defect and arranged to send me a new one.
    In the meantime my contractor disconnected the cooling wires at the heat pump so that the thermostat couldn't try to cool the house (it was -10C outside).
    When the new one arrived a week later - I hooked it up, had my contractor come back to reconnect the cooling at the furnace and we were OK again.
    I thought this was a fluke and went back to singing the praises of the Nest Thermostat to my friends.
    Now it's the middle of the winter again and suddenly my furnace is making a terrible sound and my house is freezing.
    Contractor is back and the replacement thermostat has begun sending simultaneous heating and cooling request (actually only a 15v cooling request but a 24v heating request).
    This time the defective (again) thermostat damages my reversing valve.
    With all the visits and now repair charges - my contractor has cost 3 - 4 times the value of the thermostat and he has now had enough experience with them to tell me this is not a fluke. The electrical circuits are cheap and these problems are cropping up fairly regularly.
    Enough!
    There are other alternatives now and I can't afford the cost or headache of sticking with this Nest thermostat.

    11 of 12 people found this useful

  • 1.0 out of 5 stars

    NEST LEARNING THERMOSTAT DOES NOT WORK!

    • Written by from BABYLON

    I am an architect and we were pretty excited by using this thermostat in several of our projects. One third of them couldn't even connect to the equipment they were suppossed to regulate even though they were compatible as per Nest's list of compatibility. And the other third would work OK for one week and then die.
    We tried working something out with Nest.com directly but they do not have real Customer Service. If you call, they'll have you waiting for one hour and then the call will magically fall and they will never follow up nor answer your emails. DO NOT BUY THIS PRODUCT. IT'S A NICE CONCEPT, BUT IT DOESNT WORK YET!!! SO FRUSTRATED BY THE LACK OF RESPONSE OF THIS COMPANY. NEVER AGAIN!

    13 of 16 people found this useful

  • 1.0 out of 5 stars

    Was good until version 4.0 software ... now leaves house without heat

    • Written by from Madison

    Loved my Nest thermostats so much I bought 5 more for friends/family. Since the software updated to 4.00 in mid Dec (who releases a major software update during the coldest winter in decades), the Nests have been failing with dead batteries, including those with c-wire connections (full voltage so battery isn't required). Apparently 4.01 isn't helping any and Nest isn't globally releasing it, you have to beg and plead to get it.

    Avoid these until Nest figures out their software issues ... I've taken the Nest Protect alarms off my want-list.

    12 of 14 people found this useful

  • 1.0 out of 5 stars

    Does not alway work

    • Written by from Anchorage

    I bought a Nest and tried to get it to work and could not, I'm a Sys Admin and still had trouble getting it to work, I called Nest and they walked me through some chgs and still would not work, Then found out the adv model of my router would not wk so I bought a diff one and still after my hours of tiring to get to wk no luck, So I bought a 2nd one just to make sure and it would not work, So I took both back to Lowe's and Bought the Hunter Douglas Model and Guess what in 20 min and it as working including on my iPhone DONT BUY THIS NEST

    23 of 36 people found this useful

  • 1.0 out of 5 stars

    breaks easily

    • Written by from miami

    bought the nest at Christmas in three months it broke

    the technician nest recommended me to use in my area told me he's seen a lot of them break

    do not buy this product
    wish apple did not carry it because I thought apple would have not carried it if it was not reliable
    now I have my old thermostat and everything works well now

    try Honeywell

    if anyone from nest reads this build a more reliable product before releasing

    10 of 11 people found this useful