Room thermostats 2 & 3 Wire, what is the difference?

Joined
10 Feb 2009
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Location
Bristol
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United Kingdom
Hi,

I'm looking to swap my room thermostat for a new programmable one.

Mine is a three wire (no earth), one I'm looking at is a two wire type, will it matter, whats the extra wire for?

Regards,

Jon
 
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Your extra wire will be a neutral which is not req on your 2 wire stat. cut back make safe or disconnect it in the junction box/wiring centre
 

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