Central Heating Controller - What can I do

Central Heating Controller - What can I do

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K50 DEL

Original Poster:

9,253 posts

229 months

Monday 19th September 2016
quotequote all
As we're about to begin another season of heating I thought I'd post here to ask some advice from people who know a little more than me.

I have a typical 1960s 3 bed semi with a valiant condensing combi boiler and a wireless (I think) controller in my downstairs hallway.
This controller is the cause of my problems.

I want to be able to timer set the heating to come on once in the morning and once in the evening, to a temperature that I set.
If it's not in those 2 time periods then I want the system to stay off.

What has happened ever since I moved in is that the system comes on and off as timer set but outside of those times seems to think that I want the house at 16c and so is running all the time (I normally set my heating to 14c as I find that comfortable)

Would changing to something like NEST or similar solve this?

K50 DEL

Original Poster:

9,253 posts

229 months

Monday 19th September 2016
quotequote all
anonymous said:
[redacted]
It's a Honeywell controller but I have no manual for it, I tried to lower the temperature during the "system off" time period (if that makes sense) but a short time later it's back at 16 degrees again, it's driven me batty ever since I moved here, but until recently I was only in the house for a few weeks a year so it didn't really matter... now that I'm back in the UK full-time it's a little more important.

K50 DEL

Original Poster:

9,253 posts

229 months

Monday 19th September 2016
quotequote all
anonymous said:
[redacted]
Why didn't I think of checking that... I just Googled it and you can set the NEST to whatever frost protection temperature you like... question is though, can you set it to just come on and off twice a day!

andy43

9,754 posts

255 months

Monday 19th September 2016
quotequote all
You may need to get into installer mode to alter the lower set point or see what the frost protection is set to - I seem to remember some of them might possibly have adjustable frost settings 5 or 16 degrees. Try googling images of honeywell wireless stat to find the model number if you can't locate it and then have a look at the installers manual - most current ones are on honeywells website. If it's basic digital with up/down/eco it could be dt92e, if loads of buttons cmt921 or cm927, etc.