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I recently installed the Nest Thermostat in my house. Since then I have noticed that my boiler seems to Heat for 10-20 mins and then shut off, then rest for 10 mins and then repeat. This to me seems incredible ineffecient. I cannot tell you if it done this before of whether this is a new thing...

This is the cabling I am staring at now, just trying to wire up. //www.diynot.com/diy/attachments/image-jpg.110634/?temp_hash=ed4f3bb384608951b9f3b2824dd919c5

Yes I wired in a socket to keep the wife happy and the danger out the way. I did think that about the earth but the Instructions don't really mention it for this set up. No i had 1 as Red and 3 as Yellow on the old thermostat.

That is perfect, great explanation. I will try this tonight and let you know the outcome. Thanks so much for your help with this!

The cabling from the thermostat will this be the four core cabling? So I remove the L (Red), N(Blue) coming from the thermostat from the terminal connectors therefore disconnectin it behind what would I use for call for heat on the heatlink with the yellow cable (brown in 3 on the heatlink...

Yes thats right, I believe they are coming back to wiring box behind the heatlink. If so this is how they are currently wired in. Red to a live terminal connector with the mains live and a cable to L on the heatlink, Blue to a terminal connector with the mains neutural and a cable to N on the...

Hi, Thanks for the reply. Pictures now attached. I believe the old thermostat cabling comesback into the heatlink but it is wired to the mains behind the heatlink. Could it be the case that I remove it from the mains and put in t1? The yellow cable I use in the call for mains in 3 on the...

Hi All, I have recently purchased the 3rd Generation Nest Thermostat. I managed to wire the heatlink up replacing the old controller next to the boiler. The thermostat connects perfectly and this now runs smoothly and I can trigger the heating on and off wirelessly. My next task was to...