Thermostrat time changing

[samgoffe]

I have an old analouge theremostrat which keeps changing the time the heating comes on and goes off.

I will set it al up to come on in the morning at 7am for 2 hours, then on at 6pm till 10pm. See below.

But when it hits the OFF tag, it doesnt click the boiler off, it just pushes the OFF tag around the dial as the time goes on.

It will eventualy get so the heating is only off for 10 minutes before going back on. See the pic below.

Any ideas? I'd rather not have to pay for a new one!

 

[kevplumb]

get yer hand in yer pocket

not worth messing about with

 

[breezer]

thats a timer, not a thermostat. loads available from any diy shed or screwfix

 

[samgoffe]

Yes, timer sorry.

I could do the work, but is it something that should be done by a professional?

 

[breezer]

no they are quite often easy, but i suppose it depends on what you call easy.

most now have a "universal back plate" you need to transpose the connections from what you have to the new one.

i dont do this for a living but found it easy.

noted which cable does what

put in the right place on new back plate (it comes with several options.

even easier for you is to get another of those that you already have, but you will need its model number, may even be a direct replacement for it

 

[samgoffe]

no they are quite often easy, but i suppose it depends on what you call easy.

most now have a "universal back plate" you need to transpose the connections from what you have to the new one.

i dont do this for a living but found it easy.

noted which cable does what

put in the right place on new back plate (it comes with several options.

even easier for you is to get another of those that you already have, but you will need its model number, may even be a direct replacement for it

I've found a direct replacement for it. Or i could get a digital one which uses the same back plate.

Thanks for the help.