Replacing Honeywell CM707 with Nest

19 Sep 2018
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United Kingdom
Hi all

I'm looking to change my existing Honeywell CM707 digital thermostat with a Nest. Connected to an Ideal Logic Combi 35 boiler.

The Nest comes with a heat link (relay) box and then the thermostat itself, but I believe the CM707 is connected directly to the boiler as I can't see a relay box for it.

I understand wiring but I'm a novice when it comes to central heating, so my question might be very obvious

My question is, should the relay box be fitted to where my old thermostat is fitted or do I need to make a new connection next to the boiler?
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Did either of you have any success? I too am thinking about replacing my CM707 with nest. Is it easy?
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