TRV radiators not controlled by heating timer

[D_Hailsham]

There is a Siemens RWB9 programmer next to the boiler https://assets.new.siemens.com/siem...d0124154b347f13fb3bc193b98/rwb9-datasheet.pdf
This may control the hot water and does not control the upstairs radiators.

It may work with the hall thermostat.

There is a Siemens Landis & Staefa thermostat in the hall which controls the temperature of the upstairs rads

That does not make any sense. Why have a thermostat downstairs controlling the temperature of rooms' upstairs?

And a Siemens L&S RDE10.1 programmer in the living room that controls when the upstairs rads come on

This is a programmable thermostat, so it controls both time an temperature. But why have it in the living room if it's supposed to control bedroom temperatures? In any case, you seem to have two separate systems both controlling the upstairs rads: 1.the RWB9 and the hall stat; 2. the RDE10 programable stat.

There is obiously something wrong with the wiring, but it needs someone on site to sort it. Remote diagnostics would take too long.

 

[Fumblina]

That does not make any sense.

You are right there! It does seem crazy as when the downstairs gets too hot we are cold upstairs unless we turn up the thermostat to nuke levels but there are no thermostats upstairs. Turning down the hall thermostat has no effect on the downstairs rads, only changing the TRVs makes a difference.

We are planning to switch to a Nest based system and probably a new boiler too so hopefully we can iron out all the problems then.
Just a matter of making sure the engineer we use actually knows what he is talking about and isn't trying to fleece us.