you can just remove it and put a normal room stat and or programmer depending on if it's heating only or heating plus timer and or water control...
Our old system had a timer in the kitchen and a stat in the hall. New boiler it's all on the hall control box
Looking at the wiring schematic
https://www.google.com/url?q=https://ww ... te2iv2ZpSS
Lot to be said for simplicity we got a new boiler and it's programmer is a clever box but way too complex for what it does... Give me a old analogue segment timer any day
Danfoss do one that you can control locally via a app without subscription ... But why
Mrs Andy would be forever fiddling with it.
She's not found the energy saving mode on ours yet which keeps the temperature 2°c under what she sets it at
Apparently you need to be gas Safe resistered to do wiring relating to gas boilers.... As I got bollocked for replacing the old time clock here got pissed off waiting for the landlord
(identical unit just clipped on old back plate gas man didn't like the fact that I'd sorted it when he turned up 3 weeks later)
Latest system when I took it off to decorate needed rewiring I'm not an electrician but I've worked with a few and recognise poor making off the CPC aka earth wasn't insulated or terminated .. so much for gas Safe...
We won't mention a gas Safe man turning our boiler into a bomb either by capping off the boiler vent. ..v