Nest Thermostat turning heating on when should be off

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Hi,

Anyone know why my heating comes on when theres nothing set in my schedule?

Below are some photos of the app ;

 

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My money’s on there being a human who isn’t you manually turning the heat up.

Yeah. We had this a year ago. It kept coming on at 4am and it turns out our daughter was waking up putting it on so it would be warm when she got up at 6!

My side of the bed is right by a radiator and it used to be awful!

Took about a week to work it out.

No it can’t be that there’s only me and my girl friend and she tells me she never touches it. It also comes on at 11pm sometimes when she’s in bed so definitely not been changed .

 

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At 8am, you've set your schedule to be 22.5 degrees.

At 9.30pm till midnight, you've set your schedule to be 23 degrees.

So I'd say its working as expected.

Its set at 9.15pm, how do you know its on until midnight?

 

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Go onto the history tab, it tells you the reason why it came on.

 

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At 8am, you've set your schedule to be 22.5 degrees.

At 9.30pm till midnight, you've set your schedule to be 23 degrees.

So I'd say its working as expected.

The way your schedule is setup, your target temperature is 22 degrees or higher from 6am till midnight. I assume you've misunderstood how the schedule is setup. You need to put a much lower target temperature at the times you don't want the heating to be on.

I dont understand, all I want is to have heating on in the morning and evening, when im away at work or in bed I dont want it on, how do i set that up in the schedule ? I assume leaving no temperature in the schedule would mean its completely off.

 

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It doesn't work like that. The thermostat always has a target temperature. It will never be completely off. You can set the target temperature ridiculously low at the time you want the heating to be off. I usually set mine to around 18 degrees, so on very cold days, the heating will come on even if we are out. There's pros to keeping a house at a moderate temperature rather than allowing it to get very cold, which then may potentially require a lot more gas to heat it back up, as opposed to maintaining a higher temp.

So what your saying is I need to set temperatures for every time for every day of the week, even when I don't want it on?

Can you send a screen shot of your schedule and settings and I will try yours

 

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If you tap each icon it'll tell you why it's on or off.

cool fonts alphabet copy and paste

You see where i highlighted it came on but there was nothing in schedule

 

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You've completely misunderstood the way the schedule works and you have way too many entries in there.

Yours is setting 23 degrees just before 9.15pm and the next change is 14.5 at midnight (in the OP, in the post just above it's pretty much permanently trying to achieve 22, 22.5 or 23.5).

So from 9.15pm until midnight it's trying to maintain 23 degrees.

What temperatures do you want at what times? We can probably tell you how to set it.

Yes it sounds like I have misunderstood how the schedule works.

I want it on from 5pm till 10pm at around 23c

I then want it off until 6am the next morning till around 8.00am at a temp of 22c

 

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That's how mine is set to have the heating 'on' in the morning and the evening, aiming to not drop below 17.5. Outside of those times, it's only really trying to achieve 15.

Low temperatures because where the thermostat is located is a bit crap and is a bit cooler than the rest of the house, if it was set to 20+ the lounge would be like an oven.

So because the last temperature is 15c it will stay at 15c throughout the night until 6am when it goes up to 17.5c? have I understood that right?

 

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Yes, it will consider the last item it saw in the schedule as being the target temperature until it gets to a new temperature in the schedule.

Thanks I get it now, what's your other settings true radiant, leaf etc?

 

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I keep True radiant off as I prefer to set my schedule myself and have full control over it.

I also have sun block on as my downstairs stat gets hit by direct sunlight around mid day.

It's all left 'on' or 'ready'

Hows this look?

 

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That should do what you want it to

You could probably consider dropping the temperatures a bit earlier in the evening - i know it's obviously personal preference etc. but if the temperature dropped to 22.5 at 9.30pm for example, would you really want the heating to come on again?

no I wouldn’t want it

thanks for your help will see how it goes

 

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Looks good. So from 10pm to 6am, the heating should remain off, unless it gets blisteringly cold inside.

Yes thanks for your help will see how it goes

 

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This for sure. Ours knocks off around 8pm and it stays warm enough through the night from that.

On a side note 23C sounds utterly horrible

Gf likes it hot, even at 23c it’s not warm enough

 

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So you could add say 21 at 9pm and then from 9 til 10 it'll only aim for 21 rather than 23

yes could do that or could I drop it to 14c at 9pm and it will stay warm until 10pm when we go to bed ?

 

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@Kenai

what’s choose max duration under true radiant ?