I recently had a heat pump installed and have the thermostat (Honeywell Home T-Series Thermostat) etc connected to the Homey Pro.
One of the radiators has fans underneath it which were previously operated on a heat sensor, but that no longer works so well because the water temperature is much lower, so I connected the fans to a smart plug and created the following flows:
When: thermostat mode has changed to ON / Then: Turn smart plug on
and
When: thermostat mode has changed to OFF / Then: Turn smart plug off (after 20 minutes)
The flow seems to work once each - to turn on and off - after you press play, but otherwise doesnât do its job. I tried using a different When trigger (namely when the heat pump draws more than 200W power and when it stops doing so) which had the same result.
Has anybody else experienced similar problems? Grateful for any thoughts.
Does the mode change or is it something you set once? Sounds like a mode you set once.
Is there any other when card that tells when the thermostate is heating or not.
If there is no other card that tells when the thermostate is open or closed (probably not) you need to meassure the power or temperature.
What device did you use for meassuring the power?
Did you check insights for the device to understand how it changes?
Hello Anders - the thermostat has modes âheatingâ and âoffâ; when the temperature drops below the set temperature, it starts heating, and once it has reached that, it turns off - itâs set on this temperature constantly, so it goes on and off like this multiple times a day.
I also wondered whether it was a problem with the Honeywell app, so I tried a different one - I used the heat pumpâs app (WeHeat). Oddly, even though the device displays status (heating / standby / etc) on the app, there are no cards which allow you to use these for a flow. So I set up a flow saying that if the power input exceeds 200W, then the fans should turn on, and once it drops below 200W, they turn off. That did the same thing, it worked once each time when I pressed the play button. The heat pump has its own measurements of power so this should really work!
Adrian - yes I also tried with it turning off immediately without delay, same result.
Hereâs an example of the âpower inâ insight from today - it basically immediately goes to 500W as soon as the heat pump starts heating, so I would have thought that this should have worked.
The mode setting is probably only for enabling heating cycling, and is not following the actual heating.
So âHeatâ = turn on/off pump according to temperature.
âOffâ = turn off the pump, non-working mode.
This is more or less what I had (see attached) - I just recreated it (it doesnât seem to give an âelseâ option) weirdly, when I activate it, it turns on even though the heat pump is currently on standby and has no power input (I checked the insights to confirm).
I then changed from 200 to 500W as in the pic, same result.
I wonder whether itâs different that the input âbecomesâ more instead of âisâ - i.e. itâs measuring changes rather than constants
I was thinking about this too, but I havenât seen one which allows me to compare (âif thermostat temp is higher than room tempâ), only ones that trigger if the temp is above or below a certain point.
Also if itâs something like âif room temp is less than 19â, I guess that might work, but would have to be updated every time you change the temperature.
