Nest Thermostat wiring

[Jahmoys]

Please can someone Help, i am having difficulties put up my Next thermostat. so; 

I have a MySon (Neostat) on my wall , i want to replace it with Nest 3rd Gen thermostat. 

The wires that are connected to myson, are A1, A2, L, N, RT(not connected) 

I brought the Nest without! the Heat link, so I have Y1, Y2, G, OB,RC, W1, W2 aux, C, *, RH

Please can you help me match these wires correctly. 

much appreciated 

[listairee]

Hello @Jahmoys,

Thanks for reaching out. Please use the following compatibility checker to check if your system is compatible with Nest thermostats: Compatibility Checker. For installation guide, please use the following guide to help install your new Nest thermostat: How to install your Nest thermostat.

Hope that helps!  🙂

[Markjosephp]

Hello folks,

I wanted to stop by and see how I could help.

Thanks for the input, @listairee.

@Jahmoys, to determine your systems' compatibility with the Nest Thermostat. Could you please share with us a photo of your thermostat's wiring? Also, from what country are you posting?

I'll look forward to your response.

Regards,

Mark

[Jahmoys]

Hi

i am living in the UK

see attached 

 

 first photo is my new nest and the other photo is my old next. If you know what wire goes into what you would be a life saver. 

[Jahmoys]

Meant to say old heating system. 

[Jahmoys]

Hi 

I did check the compatibility checker and it has my wire on it just not showing me what wire match with my next wire