Vicare Water heater target temperature can‘t be set

[ignazhabibi]

The problem

I have a E3 Vitocal heatpump. The integration includes a water heater control but it just shows the current temperature. It would be extremely helpful to set the target temperature, the viessmann API offers this possibility in the basic subscription. The setting is independent from any schedules.

heating.dhw.temperature.main

Shows the target temperature value of the domestic hot water (DHW). Also provides a command to set the target temperature

What version of Home Assistant Core has the issue?

2024.8.1

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

ViCare

Link to integration documentation on our website

https://www.home-assistant.io/integrations/vicare/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[home-assistant]

Hey there @CFenner, mind taking a look at this issue as it has been labeled with an integration (vicare) you are listed as a code owner for? Thanks!

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[CFenner]

Can you please provide a diagnostics file, my device does not have dhw.

[ignazhabibi]

Sure

config_entry-vicare-75a1bf8b35a4021701a1586831e619e6.json

I already tried the mentioned command with postman - I works as expected and sets the target temperature as wanted.

[ignazhabibi]

My use case is to increase target temp when enough solar energy is availably via an automation. Get this error when executing

[ignazhabibi]

[CFenner]

Can’t you use one time charge for that?

Nevertheless we can add this ability to the water heater.

[ignazhabibi]

One time charge only heats up to the target temp of 53. I want to increase the target temp to 60 and then use one time charge so that more solar energy is used.

[ignazhabibi]

Setting target temp does not heat up the water. It just sets the temp when scheduled heating or one time charge is running.

[CFenner]

Can you set it on the water heater entity? At least the set_temperature method is implemented. Do you have a dhw secondary temperature number entity?

[ignazhabibi]

Can't do anything on the water heater entity except of viewing the current water temp.

I don't find a dhw secondary temp number entity. What is this? The Viessmann API docs does not mention this data point at all.

[ignazhabibi]

[CFenner]

Get this error when executing

What happens when you use a entity id instead?

[ignazhabibi]

This works!

[CFenner]

Just had the same issue for the Miele climate entity. When temperature is null you cannot change the temperature via the UI.
Try to set the temperature via the developer tools and see of the ui changes. Note that this is probably overwritten after a short time (1min).