Nest Thermostat Fan not turning on when the heating or cooling is on

[ryanspire]

I have been running homebridge for about a year and have have great success with it, thank you for all the work you do! I am attempting to perform the simple action of having my ceiling fan turn on (lutron switch) when the furnace starts heating/cooling the house. I have tried a number of different methods to do this with Homekit as well as IfTTT. I am trying to figure out if this is a 'working as designed' situation with Homekit or if there is something that can be added to the Homebridge to make this happen.

• The thermostat temperature and mode is properly displaying and being controlled by the Homekit and Homebridge setup.
• The thermostat shows properly when it is heating or cooling inside Homekit by changing colour.
• The thermostat is not an available accessory when creating an automation with a trigger of 'An Accessory is Controlled'. Is this working as designed and thermostats aren't listed as accessories in Homekit or is this a problem with the Hombridge implementation?
• The thermostat fan is available as its own accessory in Homekit and can be controlled to start the furnace fan.
• The thermostat fan can be used as a trigger to control other devices when creating an automation.
• The thermostat fan does NOT show as being turned on when the furnace is running and heating or cooling the house. Is this working as designed or is this a problem with the Homebridge implementation?

Thanks for your help!
Ryan.

[ryanspire]

Any thoughts on whether you can use the thermostat turning on and off as an automation trigger?