Replacing a room thermostat?

[preecy]

We have an old Honeywell thermostat downstairs to control the temprature. Upstairs (in the airing cuboard) we have a digital programable control to turn on/off the c/heating & hot water.

We'd like to replace the Honeywell thermostat with a more modern digital model. There's 3 wires (red, yellow and blue) which go to pins 1, 2 & 3 on the back. Is this a fairly straight forward DIY job or should i get a professional in?

thanks in advance

 

[seco services]

Is this a fairly straight forward DIY job or should i get a professional in?

thanks in advance

only you know if your capable of doing it.

 

[VictorDelta]

preecy

It's pretty straightforward with a bit of common sense and as long as you follow the new thermostat's installation instructions.

V

PS As you'll see, by coincidence, I started a new thread at about the same time as yours asking for advice on particular types of thermostat.

 

[mrgas]

preecy

It's pretty straightforward with a bit of common sense

Its also fairly easy to electocute yourself if you dont know what your doing.
If you have a reasonable knowledge of electrics and a multimeter to check for safety it is fairly simple.

I would recommend a Honeywell programable roomstat.
Most likely red to terminal A Yellow to terminal B Tape up blue.
These would need to be confirmed with a multimeter but are the most comon configuration of room stat wiring

 

[abssm]

I have the same set up as the OP and am also wanting to change my dial thermostat to a digital one.

Can mrgas (or anybody else out there) explain why to go for a programmable roomstat when all the times are controlled by the existing timer in the airing cupboard?

 

[picasso]

I have the same set up as the OP and am also wanting to change my dial thermostat to a digital one.

Can mrgas (or anybody else out there) explain why to go for a programmable roomstat when all the times are controlled by the existing timer in the airing cupboard?

so you dont have to run up the stairs every time you want to change something on the central heating times, like if you get home an hour early or want to stay up to watch tele.

 

[abssm]

I have the same set up as the OP and am also wanting to change my dial thermostat to a digital one.

Can mrgas (or anybody else out there) explain why to go for a programmable roomstat when all the times are controlled by the existing timer in the airing cupboard?

so you dont have to run up the stairs every time you want to change something on the central heating times, like if you get home an hour early or want to stay up to watch tele.

Oh i see

I am assuming i would have to leave the heating controller upstairs on "constant" then. How much more electric am i going to use though, as the little red inicator light is going to be on constantly

 

[holty]

easy if you can trace what wire is doing what.dont pressume though.had one the other day unknown stat with no diagrams, were the earth was used as a switch live but different colour the other.fooked the programmer.even caught my sparky out.worst can happen is a flash bang.

 

[VictorDelta]

... How much more electric am i going to use though, as the little red inicator light is going to be on constantly

Small LEDs (or even the old tiny neon lamps) use very little electricity indeed, so no need to worry - as long as things are not wired such that a pump etc is left running continuously all day.

 

[twgas]

You could alter the wiring in prog, remove wire from CH on (usually No4) and put it in the perm live (L), then you can leave CH off at programmer and save a fortune not using a LED