Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Will the thermostat indicate if the furnace is actually running?
Document: With the Nest out of the loop, the furnace stayed on and heated my house. The spell was broken!That was the last time the Nest was on my wall. It's now been replaced with an ugly, reliable thermostat. An ugly, reliable thermostat that actually turns my furnace on each morning. You know, the one thing you absolutely need a thermostat to do.
And it did. Never noticed any issues with it.Fast forward to December, when the Protect came out and Nest rolled out the 4.0 update. It destroyed my thermostat. It kept cycling the furnace on and off like every 5 seconds, but never heating. The temperature was reading 5 degrees higher than it actually was in the house, and the battery was dying in it. Support was non-existent and I read horror stories of it taking 2+ hours on the phone to get support.
So anyways got it Friday afternoon and thought I would be able to install right away. It requires you to turn off the A/C and Furnace while installing and it was nearly 110 that day so I woke up early Saturday morning and started the install process. Let me say I have never installed a thermostat before or anything like it, and I installed it and had it up and running in about 20 minutes.
I love this thermostat. Now I have to remind my family to keep adjusting the temperature in the house so that the Nest can learn, versus years of forbidding anyone to touch the thermostat. It's also nice to log in and see how many hours per day the heater is running. I use my fireplace frequently and it's nice to see that how that is affecting the time the furnace is running. The install was incredibly easy.
I called Nest Support and they told me to unplug the Y wire - it is only needed for A/C. Okay... I guess that's fine for the winter. Weird that my old thermostat never had a problem.About a week later I woke up to a freezing cold house. The Nest said it was heating but the furnace was just running the purge fan. I called Nest Support and they told me nothing useful. I eventually cycled the furnace breaker and it started working normally.
I eventually had to disconnect the fan wire (it will come on without it when the heat comes on). The last straw was when the air conditioner came on this spring. The unit is warm to the touch now when the air conditioner is running. This causes the internal thermometer to run hot and the air to run non-stop.I actually love this unit.
The family loves stylish gadgets; between us we have 2 kindles, 3 iPads, 4+ iPhones, and 6 or 8 laptops (I've lost track), including one old one running latest UBUNTU (linux) release. It's geek city around here.The NEST would have fit right into this menagerie, and besides my wife's sisters had it. Bang-bang she ordered one up from AMAZON.Fortunately, we actually DID follow the instructions and DID NOT OPEN THE BOX until we had "counted wires".
I purchased two Nest's when they were first introduced back in November 2011. They were easy to install, but I had some issues with the wall anchors which were supplied. I understand that this has been fixed on the newer units. After a few weeks my batteries in the units started dropping the charge. After some research I determined my furnace was only charging the units when the furnace was running. Since we had a warm winter this wasn't going to work.
This is acknowledged on their website, but downplayed. Given that it was cold, but not cold enough to require the furnace for long stretches, the next died. To add insult, when I got them both woke up, they were not running the furnace correctly at all (and kept running the AC), and after 2 hours my house went from 52 degrees to 56, instead of the 68 I had set. My confidence in this product's ability to do it's main job was shot.
Make sure you connect the "C" wire when you hook up the device. Even if not currently used, you will need to connect the blue wire to the furnace as well as to the "C" port on the device. This allows for the unit to charge as needed. Otherwise the device will only be able to draw power to charge itself when the furnace/AC unit is running. So if you have periods of inactivity when the heat or AC isn't on, your battery may run low.
Answer: yes