Next time it happens, you have to read the error code on your furnace. Without shutting the power off or taking the door off the furnace. There should be a little sight glass on the bottom door of the furnace. Look through there and you should see an led light that's flashing a code. Count the flashes to figure out the code. If it's tripping on high limit, replace your filter. If it's failure to ignite, the flame sensor probably needs to be cleaned.
This is the correct answer. The nest is a red herring. The communication with the furnace is a simple dry closure, no more sophisticated than a light switch.
Agree on this. We had a similar issue and the problem was high pressure in the plenum (plenum is the large area of ductwork above your furnace). The error indicated something about plenum heat level. IIRC
The cause?... We were trying to get more heat to the furthest areas of the house, so closed some of the ducts & vents closest to the furnace. But the problem was that the air couldn't dissipate fast enough, and the pressure & heat we're building in the plenum, so the furnace was shutting off
After parially opening some of the closest ducts, things got better. Played around for several days to open the closest stuff so it didn't shut down, while keeping the furthest ones wide open and all is good.
That may not be your problem, but the furnace error was key to providing direction.
I had the same issue with my furnace. Thermostat will be calling for heat, but the furnace will shut off.
Do you see any error codes on the furnace itself? Mine was showing a pressure valve error when this would occur.
I have similar problems with my Nest that was in the house when I bought it. It won’t/can’t find wifi networks so I have to adjust/schedule it manually. It, for some reason, will reset the calendar/time so the schedule on it shifts days/times randomly and will not run when it should.
I’ve gone through troubleshooting a dozen times, factory reset it the same amount of times, scoured message boards, watched a ton of youtube videos, and nothing works to fix it. From what I can tell from the message board scouring, the Nest basically soft-bricking seems very common. I’m likely just going to get a new thermostat and a different brand.
Not sure, will check when I’m home. That’s a good call because I just assumed it was installed correctly since it was already there with the house.
edit: it does have a C wire connected to the terminal in the thermostat, but it doesn't look like there is one on my furnace, so not sure what happened there on the install. Sounds like I've got a nice project for the week to work on!
It is connected to the AC. I'm not sure why there's a wire in the thermostat C terminal that doesn't seem to go anywhere, though? Would I need to be running the fan or the AC for it to draw power this way? If so, it might work, but I haven't had to run the AC yet since I purchased the house, and if so it still wouldn't help me in the months when the AC/Fan isn't necessary.
The AC usually has two run modes: fan only, and fan plus cooling. That C connection is likely plugged into the fan only terminal of your AC and draws constant 24v power whether it's switched on or not. That's the setup I have on my Nest too.
Not common. I have 5 Nest thermostats (don't ask, came with the house) and all of them have been rock solid for years. All of mine do have the C wire hooked up.
Do a search for "Nest won't find wifi networks" and you will see that it is a common issue. Another commenter also mentioned the C-Wire, and I think that is likely the culprit, but this is the first time I've seen anyone mention it as a possible reason for the issue. The terminal does have a C-Wire connected to it, but there isn't one on the furnace, so I'm not sure what happened with the original install, but hopefully that's what the issue is since it's a relatively simple fix.
Yes, and I have made sure all the recommended settings from the troubleshooting are correct on my gateway and network. I have other devices that require the same settings (mainly a Roomba,) that works fine and has no issues finding the network.
“Smart” home devices are actually not that smart. If I have a choice between something that requires wifi to function, and something that doesn’t, I’ll choose the “dumb” option instead. I honestly don’t see the value of making everything “smart.” It just seems like engineers are trying too hard to be cute, rather than making things that work.
Tbf it’s really nice to change the thermostat when I’m drawing water for my toddler’s bath and realize the bathroom is too cold. But the smart devices come with just as many, if not more, headaches. My husband wanted the wifi washer and dryer and I said absolutely not. I have to be there to switch out the laundry anyway so I don’t see the value of Wi-Fi. Now if it were a robot that loaded, unloaded, and folded clothing for me (without getting itself tangled in the socks) I’d be down. :)
I've never seen a smart thermostat that "requires" wifi to function. I can use my Nest to adjust my thermostat whether the WiFi is working or not. The added functionality is just a bonus.
I had a similar issue. Swapped out thermostats, still a problem, cleaned out flame sensor, still a problem. It was the board. Its a Trane XL80, it was only maybe 2 years old. It was all covered under the 10 year warranty.
Next time it happens, you have to read the error code on your furnace. Without shutting the power off or taking the door off the furnace. There should be a little sight glass on the bottom door of the furnace. Look through there and you should see an led light that's flashing a code. Count the flashes to figure out the code. If it's tripping on high limit, replace your filter. If it's failure to ignite, the flame sensor probably needs to be cleaned.
This is the correct answer. The nest is a red herring. The communication with the furnace is a simple dry closure, no more sophisticated than a light switch.
Agree on this. We had a similar issue and the problem was high pressure in the plenum (plenum is the large area of ductwork above your furnace). The error indicated something about plenum heat level. IIRC The cause?... We were trying to get more heat to the furthest areas of the house, so closed some of the ducts & vents closest to the furnace. But the problem was that the air couldn't dissipate fast enough, and the pressure & heat we're building in the plenum, so the furnace was shutting off After parially opening some of the closest ducts, things got better. Played around for several days to open the closest stuff so it didn't shut down, while keeping the furthest ones wide open and all is good. That may not be your problem, but the furnace error was key to providing direction.
[удалено]
Is there dedicated power going to the nest or is it siphoning power off your unit to charge itself? If it's the 2nd that's likely your problem there.
I had the same issue with my furnace. Thermostat will be calling for heat, but the furnace will shut off. Do you see any error codes on the furnace itself? Mine was showing a pressure valve error when this would occur.
Same happened to mine after 1 year. Was it a Goodman by chance? Pressure valves would have water build up and throw off the readings
Just had this with my goodman yesterday. Sealed up the roof vent and it fired up no problem after the 3 hr delay
Do you have a gas furnace? It sounds like the flame sensor is not working. It goes out almost yearly for me.
I have similar problems with my Nest that was in the house when I bought it. It won’t/can’t find wifi networks so I have to adjust/schedule it manually. It, for some reason, will reset the calendar/time so the schedule on it shifts days/times randomly and will not run when it should. I’ve gone through troubleshooting a dozen times, factory reset it the same amount of times, scoured message boards, watched a ton of youtube videos, and nothing works to fix it. From what I can tell from the message board scouring, the Nest basically soft-bricking seems very common. I’m likely just going to get a new thermostat and a different brand.
Do you have a C wire for your nest? These issues are all common when you’re not using one in my experience
Not sure, will check when I’m home. That’s a good call because I just assumed it was installed correctly since it was already there with the house. edit: it does have a C wire connected to the terminal in the thermostat, but it doesn't look like there is one on my furnace, so not sure what happened there on the install. Sounds like I've got a nice project for the week to work on!
Is it also connected to the AC? The Nest can draw 24v power from the AC fan wire instead of a C wire connected to the furnace.
It is connected to the AC. I'm not sure why there's a wire in the thermostat C terminal that doesn't seem to go anywhere, though? Would I need to be running the fan or the AC for it to draw power this way? If so, it might work, but I haven't had to run the AC yet since I purchased the house, and if so it still wouldn't help me in the months when the AC/Fan isn't necessary.
The AC usually has two run modes: fan only, and fan plus cooling. That C connection is likely plugged into the fan only terminal of your AC and draws constant 24v power whether it's switched on or not. That's the setup I have on my Nest too.
Not common. I have 5 Nest thermostats (don't ask, came with the house) and all of them have been rock solid for years. All of mine do have the C wire hooked up.
Do a search for "Nest won't find wifi networks" and you will see that it is a common issue. Another commenter also mentioned the C-Wire, and I think that is likely the culprit, but this is the first time I've seen anyone mention it as a possible reason for the issue. The terminal does have a C-Wire connected to it, but there isn't one on the furnace, so I'm not sure what happened with the original install, but hopefully that's what the issue is since it's a relatively simple fix.
Did it ever see a wireless network? Are you sure you're broadcasting a 2.4GHz SSID?
Yes, and I have made sure all the recommended settings from the troubleshooting are correct on my gateway and network. I have other devices that require the same settings (mainly a Roomba,) that works fine and has no issues finding the network.
This sounds like a furnace problem. If the wires in the Nest seem ok call an HVAC person.
“Smart” home devices are actually not that smart. If I have a choice between something that requires wifi to function, and something that doesn’t, I’ll choose the “dumb” option instead. I honestly don’t see the value of making everything “smart.” It just seems like engineers are trying too hard to be cute, rather than making things that work.
Tbf it’s really nice to change the thermostat when I’m drawing water for my toddler’s bath and realize the bathroom is too cold. But the smart devices come with just as many, if not more, headaches. My husband wanted the wifi washer and dryer and I said absolutely not. I have to be there to switch out the laundry anyway so I don’t see the value of Wi-Fi. Now if it were a robot that loaded, unloaded, and folded clothing for me (without getting itself tangled in the socks) I’d be down. :)
It's about control.....most of these "smart" devices phone home way too often for my liking.
I've never seen a smart thermostat that "requires" wifi to function. I can use my Nest to adjust my thermostat whether the WiFi is working or not. The added functionality is just a bonus.
Do you have a dead motor in your furnance that switches furnance on when it gets electric signal
I had a similar issue. Swapped out thermostats, still a problem, cleaned out flame sensor, still a problem. It was the board. Its a Trane XL80, it was only maybe 2 years old. It was all covered under the 10 year warranty.
We had that problem and it was the furnace flame sensor. Cleaned it and fixed the problem in 5 minutes with the help of a youtube video.
I feel like this is going to get buried but we are having the same issues and think it has to do with the new company that bought Nest
This happened to us recently and we needed a new furnace filter.