Hi All,
I wonder if anyone can advise me at all.
I have had an Evohome system installed for around 2/3 years now, its with the Wifi enabled controller, driving 9 radiator/zones all with HR92's I have a standard boiler with tank so also have the controllers for Hot Water, a tank thermostat and Central Heating Controller.

All has been perfectly fine for the last 3 years or so, I have come home from work today and I have 4 zones that are all reporting that they have comms faults either with the sensor or the actuator.
Also the stored hot water sensor is showing a fault, as is the actuator for the Central Heating and the Hot Water.

Both of the devices that control the Hot Water and Central Heating 3 way valve are also showing a RED led.

Some of the zones are showing temps on the controller others aren't, even one of the zones with a coms fault it actually still showing a HR92 temp which is weird. On the HR92's some are showing the message comms, others No Sync. I have tried do a comms check (not sure exactly how to do it apart from selecting comms check in the menu). When I do it for any device it says not received for everything.

Does anyone have any idea what the problem could be.

I have ensured I have change the batteries in the HR92 devices when any alerts have been seen on the HR92 Radiator controllers, I have never seen any messages about changing the batteries on the 3 way valve controllers or the Hot Water thermostat.

If feels a bit like something has caused this, possibly a firmware update or something.

I didn't install the system, I had someone install this for me a while ago, but they don't seem to be able to advise or help in this instance.
Any pointers would be greatly appreciated.