Old Milux replacement

[diy mad]

Hi
Trying to replace wired programmable thermostat as in photo.
There is no branding on it but the QC label says it’s a Watts Milux P3350.
I can’t find that on Google but the new Milux stats seem to have 3 wall connections whereas mine has only 2.(brown blue mains)
Any advice gratefully appreciated.

 

[RandomGrinch]

I think it should be fine - the newer stats also have a NC (normally closed) connection to the relay; this would allow them to integrate into cooling systems (A/C units), in other markets.
What is the model of the new thermostat you were you looking at?

 

[diy mad]

Thanks RG.
Think I’ve solved it, looking on the Milux website it seems that although there are 3 terminals it is fine to use 2.
Many thanks for your attention
Rgds
DIY mad