topic Furnace not staying on until target temp is reached in Nest Thermostats

Furnace not staying on until target temp is reached

SCoallier — Sat, 01 Jan 2022 19:56:49 GMT

Hi!

Nest was professionally installed and no error codes. Temp is set to 69F and a thermometer shows internal temp at 58.5F. The furnace comes on occasionally but does not stay on as expected until the house reaches 69F.

It’s in Heat mode not in Eco mode because the OnTech appointment took a while to schedule and it has been cold in the house for a few weeks now. The unit is charged and I can connect to it via WiFi on my iOS devices, and the “Time to Heat” is noted as 1 hr 25 min, but it’s pretty much staying there…it’s 47F outside. I also just changed the filters.

Any help would be appreciated, thank you.

Re: Furnace not staying on until target temp is reached

PDXMan — Sat, 01 Jan 2022 19:15:50 GMT

Having same issue here. Ensured Seasonal Savings is off. Schedule set to 67, home temp is 57. Eco temp is set to 65, though is in Heat mode. Adjust temp to 75, nothing happens.

Re: Furnace not staying on until target temp is reached

SanNGA — Mon, 03 Jan 2022 08:20:04 GMT

I too had this issue and someone on another thread suggested to turn off the safety temperature settings and that has worked for me so far. It now warms according to schedule all day and night (as well as any manual increase/decrease). I live in Georgia so that is not as big a deal for me as it would be for someone who lived in a much colder state/location.

I have also seen in other threads someone suggest that you simply remove the device from your account and then reset it completely, go through all of the settings to reconfigure it as if it were a new installation and finally added back to your account. That seemed to work for some others. If you have not tried either of those I would suggest giving those a try.

Apparently it seems to be some glitch with the software/firmware version 6.2–22 Good luck!

Re: Furnace not staying on until target temp is reached

PDXMan — Mon, 03 Jan 2022 16:46:09 GMT

Update:

Called out professionals and they found two birds. One was all the way to the fan blades while the other was stuck in the exhaust tube. Cleared everything and the system was back to normal.

Re: Furnace not staying on until target temp is reached

SCoallier — Mon, 03 Jan 2022 16:52:10 GMT

Oh my goodness! Glad they found the problem(s).

Re: Furnace not staying on until target temp is reached

SCoallier — Thu, 13 Jan 2022 09:30:39 GMT

My problem was in the furnace as well…I had an HVAC specialist take it further apart and some of the interior wiring was quite melted/corroded.