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  1. Wired directly to the boiler (instead of using...

    Wired directly to the boiler (instead of using feeds via the zone valves). And configured as boiler control on the controller. Normally with S Plan there's no boiler control (lots of people...
  2. That's why I mentioned traditional wiring! ...

    That's why I mentioned traditional wiring!

    having the extra BDR91 makes a lot of sense. And also protects you from broken microswitches in the zone valves, which seems to be a regular thing.

    P.
  3. Don’t forget that a boiler won’t fire if the...

    Don’t forget that a boiler won’t fire if the water flowing through it is already up to temperature.

    That always used to get me when I had an old iron boiler and a BDR91. There was power to the...
  4. Yup. The wiFi is just for external comms back to...

    Yup. The wiFi is just for external comms back to Resideo.

    P.
  5. Try moving the controller to a different place in...

    Try moving the controller to a different place in the house - perhaps a bit closer to the boiler relay.

    Sounds like something is broadcasting on 868MHz at the same time every day. Neighbour's baby...
  6. You only get those options if you have direct...

    You only get those options if you have direct boiler control.

    If you have an S or Y plan system wired in the 'traditional' manner (i.e. with the boiler being controlled by the microswitches in the...
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    I'm not sure how this can be lost comms. The...

    I'm not sure how this can be lost comms. The controller itself shows all zones at 0% but (last night) boiler demand of 11%. If it was lost comms HR92->controller then the zones wouldn't all show 0%,...
  8. If those batteries have been in for three years...

    If those batteries have been in for three years they are probably due for a change anyway.
  9. Check the battery in the hot water thermostat. ...

    Check the battery in the hot water thermostat.

    We've seen cases reported here before where that seems to cause knock-on problems with other zones / relays / etc.
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    Bear in mind that Evohome is no longer Honeywell....

    Bear in mind that Evohome is no longer Honeywell.

    Resideo was spun off as a separate company.

    That will probably affect customer service. I'm not sure in which direction, but hopefully a...
  11. Looks American - talks about furnaces and...

    Looks American - talks about furnaces and cooling. I suspect this is for one of the North American products rather than Evohome, but it would be nice if I'm wrong!
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    That's different to the example I've seen, where...

    That's different to the example I've seen, where all the zones are zero percent but the controller still shows a boiler demand.

    In your example the controller doesn't turn the boiler on and off....
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    Can you take your family back and get a refund or...

    Can you take your family back and get a refund or exchange?
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    I've seen that - all zones reporting 0% but the...

    I've seen that - all zones reporting 0% but the boiler demand with a higher percentage. It can sometimes take a minute or so for the controller to realise it should be sending 0% to the boiler. Maybe...
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    What it would achieve is that Evohome and your...

    What it would achieve is that Evohome and your phone would be talking to the Residio servers via different networks. So if you Evohome hasn't got a connection but your phone (via mobile data) is OK...
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    Next time turn off WiFi on your phone and recheck...

    Next time turn off WiFi on your phone and recheck with the app using mobile data.
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    If it was their end wouldn’t everyone here get...

    If it was their end wouldn’t everyone here get the same? I didn’t.

    If your phone was connected to the same WiFi as your controller then the app not connecting just proves that there's a failure...
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    If the boiler / heating loop is already up to...

    If the boiler / heating loop is already up to temperature it won't fire - it'll just keep circulating the water until the temperature drops. Could that be it?
  19. What area do you live in? Perhaps there might be...

    What area do you live in? Perhaps there might be another forum member living nearby who could try to help you.
  20. I guess it depends how the wiring has been...

    I guess it depends how the wiring has been 'chained'.

    Can you not get your installer back to take a look? They'll obviously know how they did it, and so would be best places to advise.

    P.
  21. Could be the microswitch in one of the zone valve...

    Could be the microswitch in one of the zone valve heads has failed.

    P.
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    I may have to go to specsavers!

    I may have to go to specsavers!
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    Yeah, but NEW TOYS!!!!!

    Yeah, but NEW TOYS!!!!!
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    I didn’t have comfort issues as such before...

    I didn’t have comfort issues as such before jumping to Opentherm. Most of what I could see was on graphs, rather than 'real world'. But then with OT I realised there was a change. Not as big as the...
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    In the case of very low demand, where I agree the...

    In the case of very low demand, where I agree the boiler might have to cycle even with opentherm, isn't it better to cycle with a low setpoint than with the boiler going full blast?

    Not just from...
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