The simple non-programmable Honeywell room thermostat fitted in our hallway appears to be fairly useless. First it appears to be about 5 degrees out, according to 2 thermometers placed next to it. Second it needs a large rise or fall in temp to switch on or off. Any recommendations for something more precise please??
I have a NEST. I'm very happy with it. It seems fairly accurate, looks very neat, self teaches, updates itself, is easy to use and can be accessed via my phone. There is no subscription to anything either. I just bought outright. The thermostat goes where you like (mine's in the hall), the controller goes next to the boiler in place of your old controller. 4 wires iirc and you're done.
There are so many variables with their positioning that room stats are rarely accurate. As with the temperature swing, some stats have a movable arm connected to the bi-metal coil, which when moved lengthens or shortens the on/off time. Take it off and have a look.
Agree they’re good - i can turn the heating down from work when the missus is at home and has turned it up to some ridiculous level - i just need it to show her a message “ put a jumper on” when she tries to turn it up and it would be perfect. 21.5!!!! Turn it down man, unless that’s the setting for the garage, then as you were.
Get a remote one, and put it in the living room when you are there, then take it to bed at night - worst place is in a hall, especially if there is no rad in there like my Mams Mines a Horstmann Not into all this modern geeky stuff like Rob
Re-calibrate it...i.e. Pull the dial off and put it back on at the correct temperature? Did that to mine last year.
There is a rad in the hall. I don't mind the location and don't need anything fancy, I just want it to be better at what it does, ie maintain a relatively constant temperature, which corresponds reasonably accurately to what swmbo sets on the dial.
Mine is an old sunvic tlx2356, the round dial type where often you have to push it past 25 just to get it to come on and then god knows what it does. It is the bi metal strip and spring type If I was a design tart I'd love the nest design but at £160 plus I'm too tight, my half Yorkshire heritage I ended up buying a wall thermostat that works just as a thermostat at less than £30 https://www.screwfix.com/p/flomasta-24701sx-wired-digital-thermostat/2923g It's a semi open lounge,kitchen and dining room so it will be able to see just how accurate it is as I run a normal room temperature thermometer
I fully understand that the temperature where the thermostat is positioned does not necessarily correspond precisely to the temperature in say, the lounge. However, I would like it to be accurate in its given location to within a degree or two. The arm thing sounds interesting, as does the refitting of the dial to recalibrate. All I want is a simple device that does its job well.
Exactly! You think 'It feels a bit nippy/warm in here' and have to rotate the dial to get the heating to switch on or off and then reset it to where it was, having switched. How rubbish is that?? Have you fitted your new thermostat yet? If so, any better?
Not yet but soon. It has 3 wires, the replacement is two wires, I know which one to blank with a lego brick but my son in law owes me shed loads of favours and he's promised to do it for me. Whilst I can do it myself, the slippery fekka is gonna get made to do it as he's an electrician. If not I'll fix it on myself midweek and report back as to it's accuracy
@Old rider The bi-metalic strip type; although able to eventually react to any change in temperature and make/break switch contacts, will invariably perform far slower than a modern thermostat. Not the most efficient way to control a boiler, as once a target temperature has been achieved there is probably a lag whilst the bi- metal strip reacts to the change, so the boiler is probably firing for longer than necessary. Same issues as the target temperature falls too, there could be a lag as the bi-metallic strip reacts to the change in temperature resulting in fall in temperature as the boiler is slow to fire. Iv'e fitted a few thermostats in my time, in my experience there is no need to pay a lot as I presume they all use some Thermistor device to electronically control the switch contacts, you won't go far wrong if you go for one of the industry standards such a Danfloss or Honeywell. worth a read:https://www.diydoctor.org.uk/projects/thermostats.htm
The reviews on Screwfix for this are really good. Slightly annoying that the basic version is only a fiver less than the programmable version though.
Programmable ones are a complete pain in the hoop and only encourage divorce proceedings.... Five quid will get you a half pint and bag of crisps
Thanks. Yes, so what I need is a simple digital thermostat as a direct replacement for the inherently inaccurate mechanical one. They seem to be battery powered, any idea why?
Never use the program features on mine - leave it on 19 all the time and drop it to 16 if I'm out for a while. Mrs Ex will fly in for Christmas, turn it up to 24 and open all the windows
