Honywell CM927 - better alternative?

[David]

As posted a while back the LCD screen on the Honywell CM927 thermostat is
failing.

Pain in the butt, and now is the time to replace central heating parts
before they are needed when the cold weather returns.

The screen failure seems to be a known fault, so I am reluctant to lash
out around £100 for a replacement if it is going to fail again in another
two to three years. Then again my daughter has one and it is fine so far.

So is there an alternative wireless programmable thermostat with better
reliability and functionality for about the same price?


Cheers

Dave R


--
Windows 8.1 on PCSpecialist box

[Tim Watts]

Dunno who the price compares, but a relative has been very pleased with
the HeatGenius system I helped them install.

ZWave based, Danfoss ZWave TRVs and wall mounted sensors which just
stick on with a sticky pad. Assuming the TRVs can mate with your valves,
the installation is a doddle.

The *only* downside is the only practical way to drive it is from a
phone app or web. Both are excellent - but it is missing a local wall
mounted controller.

That may not matter, or it may be a killer missing feature - but the
rest of the system has been extremely stable and well behaved as well as
insanely customisable.

A "cheat" to save on buying unnecessary TRVs (the expensive part) is to
not fit them to the bathroom(s) and maybe not to the main living room if
that tends to be used all day. There is a concept of "whole house c all
for heat" under the control of your schedule plus a master stat which
means you could just let these rooms heat when that, or the bedroom
zones demand. Just refit basic TRV heads to limit the temperature.

[David]

Quite a lot more than £100 just for the controller, without replacing all
my TRVs and adding movement sensors.

Interesting system but not on my investment plan at the moment.

[A.Lee]

David wrote:

> As posted a while back the LCD screen on the Honywell CM927 thermostat is
> failing.

> So is there an alternative wireless programmable thermostat with better
> reliability and functionality for about the same price?

I used to recommend Honeywell, but I too have had some failures, the
'down' button on my own has stopped working.

Anyway, Plumbcenter have an own-branded wireless programmable stat for
£51:
<http://www.plumbcenter.co.uk/en/heating/domestic-controls-valves/wireless/center-radio-frequency-programmable-room-thermostat/>

It is a re-branded Honeywell, albeit an older version.
I've fitted at least 6 of these with no problems yet.

--
Alan
To reply by mail, change '+' to 'plus'

[Graham.]

I don't even know if my "ideal" programmable thermostat exists, but if
it does it would display the set-point and current air temp on the
"default" screen and have only one active control in normal operation
which would be a large tactile knob, turning a rotary encoder giving
it the feel and look (other than the LCD display) of a traditional
bi-metal stat.

I currently have a "Celect" wireless programmable thermostat that has
a large clear display, and displays both temperatures simultaneously,
but also has the dreaded up/down buttons.
I wouldn't recommend it for that, and other reasons.





--

Graham.

%Profound_observation%

[David]

Thanks - will have a look at that.
I really like the Honeywell functionality and portability, and have had no
problems with previous Honeywell products, but the reported failure rate
of the CM927 is not encouraging.

[Dave Liquorice]

On Tue, 18 Aug 2015 23:40:06 +0100, Graham. wrote:
>> So is there an alternative wireless programmable thermostat with
better
>> reliability and functionality for about the same price?
>

> I don't even know if my "ideal" programmable thermostat exists, but if
> it does it would display the set-point and current air temp on the

> "default" screen ...

The Danfoss TP7000 does that, one big, one small.

> ... and have only one active control in normal operation

> which would be a large tactile knob, turning a rotary encoder giving
> it the feel and look (other than the LCD display) of a traditional
> bi-metal stat.

Up/Down buttons to bump the set point, another to set it to "all
day", and a fourth to extend the current set point by 1, 2, or 3 hrs
(IIRC).

I've got a TP7000 RF (ie no wires to the thermostat unit) and it's
predesessor (TP75 RF?). Both "just work", though I have just noticed
that the TP7000's display is lacking contrast so its 2 x AA's need
changing.

--
Cheers
Dave.

[David]

Sadly, the TP7000RF is almost equal in price to the Honeywell CM297.

It would be nice if you could just buy the Honeywell thermostat part
without the wireless part.

[Dave Liquorice]

On 20 Aug 2015 12:14:54 GMT, David wrote:

> Sadly, the TP7000RF is almost equal in price to the Honeywell CM297.

Is that 297 a typo or a different model number?

The TP7000RF and the RF Honeywell of similar spec (which I thought
was the 927) used to be about the same price.

> It would be nice if you could just buy the Honeywell thermostat part
> without the wireless part.

You can get a wired TP7000. B-)

--
Cheers
Dave.

[Dive The Boat]

replying to David, Dive The Boat wrote:
Hi, I have an CM927 unit, it has been in the kitchen not far from the kettle
and the display was intermittent and hard to decipher. I put it in a plastic
bag with a dehumidifier from a pound shop to see if drying it out would help.
The display is working again. Whether this is because of it being dried out
or just something that would have happened over time anyway I may never know.
Anyway, for now it's working again !! I'll update this as it develops !!

--
for full context, visit http://www.homeownershub.com/uk-diy/honywell-cm927-better-alternative-1068074-.htm

[Dive The Boat]

replying to Dive The Boat, Dive The Boat wrote:
> Anyway, for now it's working again !!

STILL WORKING but only if it's in the plastic bag with the moisture trap
dehumidifier!! I've had it in the bag until it the display cleared then each
time I've taken it out, the display has slowly begun to fade away. The second
time I did this, the display got worse when I first put it in the bag but did
then come back to normal functioning. So far it has been three days in the
bag with the clear display back again and no deterioration !!

[Redman]

Hi Lee my honeywell cm927 wireless thermostat LC D faulty can you tell me the name of the one you are talking about , do Ineed to buy both units or can I bind this one with honeywell wireless unit

--
For full context, visit https://www.homeownershub.com/uk-diy/honywell-cm927-better-alternative-1068074-.htm

[Fredxx]

On 09/01/2021 17:45, Redman wrote:
> Hi Lee my honeywell cm927 wireless thermostat  LC D  faulty  can you
> tell me the  name  of the one you are talking about  , do Ineed to buy
> both units or can I bind this one with honeywell  wireless unit

You are welcome to post here, but please read the following before
replying to a 5 year old post:
http://wiki.diyfaq.org.uk/index.php/Home_owners_hub

[John Rumm]

On 09/01/2021 17:45, Redman wrote:

> Hi Lee my honeywell cm927 wireless thermostat  LC D  faulty  can you
> tell me the  name  of the one you are talking about  , do Ineed to buy
> both units or can I bind this one with honeywell  wireless unit

Have you tried this fix:

http://wiki.diyfaq.org.uk/index.php/Honeywell_CM927_LCD_Screen_Failure




--
Cheers,

John.

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