Boiler Query

[kev2021]

Hi all,

So been visiting parents for a few days and it seems, the power went out some point over the last week and must of been a longer than normal outage as the programmer on the boiler was flashing and needing date/time etc setup.  It seems to have kept the programming times.  I’ve read the programmer guide I found online and it says if it’s off for extended period of time (over 3hrs) I’ll need to set the date/time etc.  I have no idea why its heated to 27.5 degrees though, Nest has not been set to 27.5 degrees so surely it shouldn’t of gone to this temp?

Currently I use boiler in Run mode so it comes on and off when the programmer the boiler says so and I use Nest thermostat-E just to set the temp I want.  However, even though it’s been set to eco mode, the temp was 27.5 degrees…. I’ve now set the boiler date/time etc and it has now gone off so hoping it will now come on as needed and use the nest temp to effectively heat up to that temp or not come on if hotter.

Anyone else experienced this? It’s been working fine like this for months and I can access the thermostat via nest app etc so its all online and up and running.

Will hopefully have an idea from tomorrow as the place is still cooling down so suspect it wont need to come on rest of today.

Reason I haven’t set boiler to continuous mode and lest nest control it all 100% is that I’ve found Nest wants to turn my boiler on in middle of the night if it drops below temp and don’t seem to be able to stop it, it just does it.  I effectively want it to come on at the times I want and to just be able to adjust the temp if i want to hence only way I have been able to manage this is to set it to Run mode and I adjust the temp accordingly, admittedly it only works when the programmer turns on the heating but that’s fine with me.

Kev

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[UK Sentinel]

What boiler is it ?

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[kev2021]

Sorry, Ideal Combi boiler.

Kev

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[UK Sentinel]

I believe when you manually switch to Eco, your thermostat will ignore all scheduled temperatures until you manually switch it back to heating is where I think the temperature issue could be ?

DO you have three available thermostat modes: Heat, Eco, and Off ?

 

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[kev2021]

Hi,

So this is how it has been working for several months…

Programmer tells boiler what time to come on and off

Nets Thermostat-E tells it the temp to be at, which effectively then stays off or comes on and heats to require temp.

It’s been working ok in the past, it comes on if its below 15 and heats up to 15 and goes off etc as needed.

But since the power went out some time last week, the Nest-E still is in eco mode and set to 15 but the programmer in the boiler lost its date/time etc so seems some how has had the temp up to 27….. no idea where it got 27 from…

Thanks

Kev

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[Grisu]

What is a boiler with 15°C good for?
Too less for both heating or warm water.

Anywhat, maybe there is a setting in the boiler too where you can reduce max. temp to 15.

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[UK Sentinel]

Is there a second room thermostat somewhere in the house by any chance and yes, if no thermostat control for room temp via Programmer, then this is most odd and what Microsoft might call ‘A feature’

Nest Thermostat-E probable being temperamental

@Grisu, Not everyone can afford 21°C, or they might be very carbon conscious

We have a baxi boiler and a couple of Room stats in different locations with an dedicated Programmer for timer for hot water and heating etc.

We also have a hot water tank, which has its own thermostat, set to around 65°C (ish) I think

 

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[Grisu]

But why would someone heat a boiler to 15°C only?
He is speaking about boiler temp an not room temps.

Water has about 13-15°C when it enters the house, either drinking water from the street or ground water.
So there would be no need for heating it if you dont want it warmer than 15.

I realy dont understand what he is doing.
No complaints at all – only want to know what it is good for to learn other situations.

I have a heating pump too, but there is no sense for any boiler for it, it is working with ground water 13° in and 10° out.
If you dont oversize the pump it wont need any boiler with at least 1h working cycles using underfloor heating.
If you want to heat only one room or only parts you would need a boiler, but then you should heat it up to 25°C at least for longer pump cycles.
And for warm water we use 400l boiler with 50°C enough for 4 persons.

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[UK Sentinel]

Nest thermostat-E is a type of Room thermostat and I believe even though after the power cut, the room temperature went to 27°C – the Nest thermostat-E  was still set to 15°C.

I assume as the boilers programmer was flashing due to power cut, it could not recognise or take input from Nest thermostat-E.

Interesting problem and something I have not seen before

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[kev2021]

Hi all,

Yes, the thermostat is set to 15C due to being at my parents, usually it is set to 21 when heating is set to come on and I set it to 15 when I want it off.

It’s has been on today all day at around 28C all day! So I think at this point, I’ve no real option but just turn the boiler off and then just turn the boiler on when I’m there for now as whilst I’m out at work etc, the programmer doesn’t seem to turn the boiler on/off so I’m basically paying for 28C heating all day, can’t afford to keep paying that, not now the prices have gone up and are going up again, going to get very expensive.  Thing is, I’m not sure even if I re-instated the manual thermostat that the boiler would even recognise that.

Maybe what I need to a thermostat that is wired to the boiler BUT that I can access remotely via a app so I can check it and set the programmer/temp as needed as opposed to Test which has 2 components – nest & the nest link.

Kev

 

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[UK Sentinel]

How is the Nest thermostat-E connected to the programmer currently, ?

Off and On for a period of time does sound like the next logical step for the boiler, controller and Nest thermostat-E system also.

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[Grisu]

So 15 or 21 are room temperatures (night or holiday and normal when at home.
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[kev2021]

So the programmer on my ideal logic 24 boiler is in-built into the boiler so to speak.  I’ve set it to come on at certain times of the day and to then go off at certain times each day.  Same schedule every day.  In order for boiler to use programmer it is set to Run mode.

The Nest-E basically is set to the temps I want it to be in the property i.e. 21 if I’m home, if I’m away, I set it to ECO mode which is set to 15C.  Therefore boiler should only come on when programmer is set to come on AND temp in property is below 21 (if home) or 15 if not home, if not, it stays off.

However, neither is happening and it seems to be defaulting to around 28C somehow, unsure why…

Reason I don’t set boiler to Continuous and then let Nest-E turn boiler on and off is:-

1. If temp gets low of a night, it wants to turn boiler on and I don’t seem to be able to stop it.  I know there is a fail safe/emergency mode that if temps get real low, it will turn boiler on to prevent pipes freezing etc but Nest-E wants to turn boiler on way above that level i.e. 3 or 4 degrees i seem to recall.
2. As place gets power cuts, varies on how often, not daily or weekly but came be every couple or few months, I’ve noticed Nest-E doesn’t always re-connect so not ideal, hence left it that programmer turns it on or off and Nest simple tells it what temp to be at, which has been working fine for 4 months or so.

Perhaps I need some sort of all in 1 device i.e. WIFI thermostat & programmer that’s wired to boiler so it’s just 1 unit that does it all rather than 2 units and talk to each other, if that exists…

Thanks

Kev

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[UK Sentinel]

I would simplify the set-up with a wired connection if possible ? but try powering off, just in case this works ?

The British Gas Hive system is an alternative, but reviews are varied and not positive generally ?

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[UK Sentinel]

Had a little look at other options for wireless thermostat etc.  Honeywell models seems to rate well, I noticed on Screwfix the Honeywell Home TR6-HW which seems rather fancy and can be controlled via an APP ?

Not sure if Honeywell app only manages schedules and not room temp also ?,

https://www.screwfix.com/p/honeywell-home-tr6-hw-heating-hot-water-wireless-programmable-thermostat-with-hot-water-control/202fv?_requestid=55374

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