Maybe this is real, maybe this is fake. The premise is still true

At first I thought that the parents used an extra heater, but then I read again and it sounds like the thermostat malfunctioned. The set point was 72 but the actual temperature was showing 99. This is a very sad story but like @bamarayne said. It reinforces our paternal paranoia of not having enough failsafes. My ultimate safety feature is, beside having multiple sensors in each of our baby rooms, that I would not sleep on a different floor than a baby that could not get up and walk on his/her own.

That is something I like admit the Honeywell 8320 thermostats. I can program an upper and lower limit into it at the physical device. I can control it via ST. And using Alexa helper, another set of limits can be programmed.

And, we all sleep in the same part of the house.

My Honeywell has an upper limit of 90 that I am unable to override. I thought all had this as a safety factor.

Not when the t-stat is broke…I wouldn’t think…

That only prevents you from selecting a higher temperature setting. It doesn’t prevent malfunctions that cause the furnace and fan to not be shut off when the set temperature is reached.

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I wonder what type of malfunction. The outside temperature was 78 and the HVAC was set ā€œ72 degrees coolā€ and the thermostat thermometer was maxed at 99.

The thermostat must have been ā€œstuckā€ on or some sort of short circuit. I’m not up on HVAC design. Is there other fail safe mechanisms or do they just assume the user will notice it when it is too hot?

The overnight low on Feb. 28-29 was something like 52° F, so likely the heater kicked on during the night and something prevented it from ever shutting down.

I can find only one other situation like this:

http://freerepublic.com/focus/f-news/2349829/posts

Seems the dual HVAC in an upstair/downstair configuration is the commonality.

Which makes perfect sense.

When we did the extension, local code required us to put in a smoke and co detector in EVERY bedroom. I took that opportunity to buy 7 Nest protects.

As far as having fail safe, I am using IFTTT, Smartthings, Nest, so I’d like to think I am well covered but there are definitely gaps. It would be nice if Nest Protect had a temperature sensor and can blast sirens if temperatures reached a certain level.

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