r/homeassistant • u/shhChattyMonkey • 12h ago
Using HVAC fan on/off (Ecobee/HomeKit) as a trigger
I'm at my wits' end! We have a scent machine that is supposed to run (pump scent into the HVAC system) only when the HVAC fan is running. We have Ecobee thermostats and I'm using the HomeKit HA integration.
I've tried the fan mode trigger, but that seems to detect (unsurprisingly!) the mode of the fan: on vs. auto. What I'm trying to detect is whether the fan is actually running: fan active vs. fan inactive. HomeKit doesn't seem to offer that as an attribute.
Probably irrelevant to the question, but the scent machine doesn't offer any API, nor have I found one that does. For that I'm just using a Lutron Caseta plug and switching that on and off based on the trigger.
Help!