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interests / alt.home.repair / Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006

Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006

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From: hub...@ccanoemail.com
Newsgroups: alt.home.repair
Subject: Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006
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by: hub...@ccanoemail.com - Wed, 17 Jan 2024 20:15 UTC

On Wed, 17 Jan 2024 20:03:39 +0000, Ian
<c883f4fefb19a03d967f535d20863771@example.com> wrote:

>Good evening and thank you for allowing me to join your forum.
>I'm pretty handy with most things but this is driving me mad !!!
>I have a Honeywell Smartfit programmer T8677B1006 7 Day Optimised Room Unit and the LCD display has stopped working.
>I have checked the voltage to it from the base unit and it is 12v.
>I therefore assumed that the unit was defunct.
>I sourced a new old stock direct replacement and expected it to work.
>Alas, it didn't work which I assume means that the fault is elsewhere.
>I have checked what I can on the base unit.
>240v in and 12v out.
>The wire between the base unit and the room unit is good.
>What am I missing ???
>TIA
>Ian
>Freezing cold in Cornwall !!!
>

Does it have batteries ?

https://www.smarthomeperfected.com/honeywell-thermostat-battery/

John T.

Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006

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Subject: Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006
From: trad...@optonline.net (trader_4)
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by: trader_4 - Thu, 18 Jan 2024 12:55 UTC

On Wednesday, January 17, 2024 at 3:15:42 PM UTC-5, hub...@ccanoemail.com wrote:
> On Wed, 17 Jan 2024 20:03:39 +0000, Ian
> <c883f4fefb19a03d...@example.com> wrote:
>
> >Good evening and thank you for allowing me to join your forum.
> >I'm pretty handy with most things but this is driving me mad !!!
> >I have a Honeywell Smartfit programmer T8677B1006 7 Day Optimised Room Unit and the LCD display has stopped working.
> >I have checked the voltage to it from the base unit and it is 12v.
> >I therefore assumed that the unit was defunct.
> >I sourced a new old stock direct replacement and expected it to work.
> >Alas, it didn't work which I assume means that the fault is elsewhere.
> >I have checked what I can on the base unit.
> >240v in and 12v out.
> >The wire between the base unit and the room unit is good.
> >What am I missing ???
> >TIA
> >Ian
> >Freezing cold in Cornwall !!!
> >
> Does it have batteries ?
>
> https://www.smarthomeperfected.com/honeywell-thermostat-battery/
>
> John T.

It's not clear what the "base unit" and "room unit" means in this explanation.
Looks like this is UK. In the US thermostats are typically powered by 24V AC
from the system transformer and/or batteries.

Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006

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From: hiramtsc...@gmail.com (Hiram T Schwantz)
Newsgroups: alt.home.repair
Subject: Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006
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by: Hiram T Schwantz - Wed, 7 Feb 2024 22:27 UTC

On Thu, 18 Jan 2024 04:55:16 -0800 (PST), trader_4 posted for all of us to
digest...

>
> On Wednesday, January 17, 2024 at 3:15:42 PM UTC-5, hub...@ccanoemail.com wrote:
> > On Wed, 17 Jan 2024 20:03:39 +0000, Ian
> > <c883f4fefb19a03d...@example.com> wrote:
> >
> > >Good evening and thank you for allowing me to join your forum.
> > >I'm pretty handy with most things but this is driving me mad !!!
> > >I have a Honeywell Smartfit programmer T8677B1006 7 Day Optimised Room Unit and the LCD display has stopped working.
> > >I have checked the voltage to it from the base unit and it is 12v.
> > >I therefore assumed that the unit was defunct.
> > >I sourced a new old stock direct replacement and expected it to work.
> > >Alas, it didn't work which I assume means that the fault is elsewhere.
> > >I have checked what I can on the base unit.
> > >240v in and 12v out.
> > >The wire between the base unit and the room unit is good.
> > >What am I missing ???
> > >TIA
> > >Ian
> > >Freezing cold in Cornwall !!!
> > >
> > Does it have batteries ?
> >
> > https://www.smarthomeperfected.com/honeywell-thermostat-battery/
> >
> > John T.
>
> It's not clear what the "base unit" and "room unit" means in this explanation.
> Looks like this is UK. In the US thermostats are typically powered by 24V AC
> from the system transformer and/or batteries.

Bingo! Batteries or bad transformer. Hard to tell over the pond...

--
Hiram

Subject	Author
Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006	hubops
Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006	trader_4
Re: Room unit not functioning - Honeywell Smartfit programmer T8677B1006	Hiram T Schwantz