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I think you will need another Evo controller.

https://honeywellhomeacs.force.com/livewell/s/article/Can-evohome-connect-to-2-separate-BDR91-units-which-each-control-a-heat-pump?language=en_US

Maybe try changing the router’s DNS servers manually to e.g., 1.1.1.1, 8.8.8.8 to see if that helps

Does your postcode work in Accuweather?

Apparently that’s the service used by the controller, but the App uses a different service.

Are your Location Information settings correct in your Honeywell Home app?

Not battery failure, very low battery probably causing sporadic behaviour.

I think I may have seen this issue mentioned before.

Today all of the zones on one of my controllers and some of the zones on my second controller stopped responding, displaying hourglasses.
...

I have a Zehnder ComfoAir/Cool Q600 and Evohome. They work independently.

It keeps CO2 levels down and boosts automatically if higher humidity is detected for instance when showering.
...

> If I then go and turn up the temperature in a room that has not been used the boiler goes back up to 70c for a time because of the sudden influx of colder water from the radiator in that room
...

Sounds similar to this:https://www.diynot.com/diy/threads/flow-temperature-on-greenstar-junior.425160/

I had IFTTT problems yesterday/today as well. I wasn’t able to reconnect the service until later this afternoon

You will need 2 BDR91s, 1 for your 2-port valves and the other for your Intergas DHW NTC.

On a DHW demand, 1 BDR91 opens the DHW valve and closes the CH valve.

The other BDR91 (also bound...

It looks like the HCE80 works fairly autonomously apparently calculating and responding to zone demands itself.

For instance you will see it opening actuators for zones even when the Evotouch...

I would clear all binding on the DHW BDR91, and bind it again. It may be double bound.

Press and hold the button for 15 seconds (until the red LED blinks rapidly) to clear any previous binding...

Simply change Appliance Control to OpenTherm, you definitely don’t need to touch your HR92s and probably don’t need to touch your stored hot water CS92/BDR91 setup either, but simple to do if needed...

1. Yes
2. CS92 sensor and high-limit thermostat controlling DHW valve
3. NO 2-port that closes when DHW NC 2-port opens. I also stop the UFH pump on DHW heating via a separate BDR91. For additional...

Just had 1,200m2 of farmland returned to me. My daughter is tennis mad and would like a tennis court constructed.

I figure it makes sense to prepare for the future and install a Ground Source...

I see this same behaviour with my setup OpenTherm + 4xHCE80.

Nothing you can do about it I’m afraid. At low zone demands < 10% (24C) I observe the HCE80s TPI the UFH pump even though the boiler...

Ideally Evohome would allow you to set different max CH and DHW OpenTherm temperatures, but unfortunately it doesn’t. And with some boilers the default 80C or 90C is too high.

Sure, if you are happy with the same max flow temperature and boiler settings for both DHW and CH.

In my weather compensation setup, I disconnect the outside temperature sensor on DHW heating,...

There is a nice description by DBMandrake here:

https://www.automatedhome.co.uk/vbulletin/showthread.php?6134-Evohome-firmware-02-00-19-31-Beta-Trial-Exclusive-for-Automated-Home-Members/page63

Evohome support of DHW priority has only just been added to its firmware. Previously if you had CH and DHW valves you would wire them to the DHW BDR91 such CH closes when DHW opens.

I’m not sure...

Because default operation is OpenTherm heating with only HR91/2s controlling flow to radiators.

When there is a demand to heat the DHW cylinder you don’t want 70C flow in your CH circuit leading...

Basically the CH 2-port is Normally Open and the DHW valve Normally Closed.

When there is a Priority DHW demand the CH valve is closed and DHW opens, so all flow is to the cylinder.

With...

https://www.intergasheating.co.uk/app/uploads/2019/11/X-Plan-diagram-Rapid-HRE-Eco-RF-low-voltage-option-V1.pdf
...

As I understand it, this parameter sets the closed to open, 0-100% (90 degrees) actuator time.

What do you observe when there is a 100% demand, how long does it take to open the valve?