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ok. thank you

I think so.. Could that be the problem? The current cable has worked well with the current setup so long, I assumed that it should work. I will try a different cable this weekend and see if the thermostat behaves correctly.

Hello @stem. Thanks. I actually tried to wire it up using T1&T2, that kept shutting down the HeatLink. And so, I decided to use the separate power cable. I actually want to use the T1&T2 based connection only. But, not sure why it is shutting down the HeatLink.

I forgot to add. I have setup the thermostat with its own power supply and it is connected to the heat-link and it is ok. But, I want to connect it via the t1-t2 cables, so, I dont have to run extra cables. thanks

Hello @stem thanks.. I have got the wiring done and when I switch on the mains, the HeatLink is up and running. But, when I connect T1 and T2 to the thermostat, the HeatLink shuts down (all lights down). The moment I disconnect the T1, T2 cables from the thermostat, HeatLink resumes to work...

Thanks for the kind responses. I know that my current thermostat is working. But, just not sure how its connected to the wiring center. Whoever did the wiring, must have had a clear reason for not following the nomenclature on the lid. I will try this and let you know., thanks again.

Hello there. I am looking for some help with my switch from my current setup of Drayton LP522 and Honeywell DT90 to Nest 3rd gen thermostat. I have followed prevoius posts and tried to replace lp522 with Nest HeatLink. Here is a look at my lp522 And here is a look at the hairy junction box...