Cosy 9 Heat Pump never shows as stopped

[leacho73]

Describe the bug

I have noticed that my Cosy 9 'water_heater' entity doesn't show off when its not running, not sure if this is by design, or a limitation of the API, but it would be nice to see when the hot water is heating vs idle.

In the pre v16 integration, this showed as a heating entity and I was able to see when the mode went from Idle to Heating and visa versa. Currently the pump just shows a constant 'heat pump' mode.

Reproduction steps

Heat pump is set to a schedule and when you look in developer tools it always shows the mode as 'heat pump'

Expected behaviour

I would expect to be able to see if the hot water is heating up, or if is it idle.

Tariff Code

E-1R-INTELLI-VAR-24-10-29-E

Integration Version

16.3.1

Home Assistant Version

2025.9.3

Fresh Install?

After upgrading

Home Assistant Logs

Confirmation

• I confirm that I cannot find my solution within the documentation
• I confirm that I cannot find my solution within the FAQ

[BottlecapDave]

Hello. The water heater states can be found in the docs which are translated from the states that the API provide. These possible states are limited by HA. There is a bug around the state of on which is not a valid state which will be fixed in the next release. Do you have any errors related to the integration in your HA instance?

[BottlecapDave]

If you go to pre v16, what was the state of the water zone when it was on a schedule vs not.