Room Thermostat

[appledell]

My room thermostat died and I replaced it with a bog standard Horsman.

Old TS had live/neutral and earth (2 wire) but Horsman needs another neutral (3 wire).

Can I make it work or will I need to get a 2 wire thermostat?

Thanks in advance

 

[Dan Robinson]

Getting your terminology mixed there....

Your old stat had neutral, common and call.

Or, was wired poorly and had common, call and earth.

Did you make a note of the connections on you old stat? And what was the model number.

 

[appledell]

The old thermostat was the original from the 70's - cant give the make as I am not at home at the moment.

It had red (live) black (neutral ?) and the whole box (metal) was earthed.

We have just bought the house. Central heating (conventional) works well from timer control but thermostat in hall didnt work (no matter what temp setting central heating was on)

 

[Dan Robinson]

It had red (live) black (neutral ?) and the whole box (metal) was earthed.

A favourite mistake from our sparky friends.

See my second option.

Maybe.

You need to now what the wires do at the other end assuming you didn't make a note of the original terminations.

 

[appledell]

Thanks for reply.

The previous thermostat was a maclaren type A with the live (red) going to terminal 1 and the black going to terminal 2. with the earthto base plate.

I can't see how this ever worked ?

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[Dan Robinson]

Neither can we from those pictures.

 

[matt1e]

Quite!!!

 

[appledell]

Sorry try again

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[appledell]

cant seem to make the images larger in the Post?