Script Help for automatically turning on/off fan with thermostat state.

Jmahoneyy — Thu, 14 Mar 2024 21:03:09 GMT

1. I want an overhead smart fan to turn on when my thermostat turns on the furnace.

2. I want an overhead smart fan to turn off when my thermostat turns off the furnace.

I got #1 to work using this script:

starters: - type: device.state.TemperatureSetting state: activeThermostatMode is: heat device: Main Level - 1 Family Room actions: - type: device.command.OnOff on: true devices: Fan - 1 Family Room

I am having trouble with #2

starters: - type: device.state.TemperatureSetting state: activeThermostatMode is: on device: Main Level - 1 Family Room actions: - type: device.command.OnOff on: false devices: Fan - 1 Family Room

I have also tried

"activeThermostatMode" is "off".

Re: Script Help for automatically turning on/off fan with thermostat state.

robbygomez36 — Wed, 22 Jan 2025 00:20:41 GMT

Give the two scripts below a try.. I have Gen 3 Nest Thermostat and a Meross Fan Control wall switch. If it is winter time, then you have the Nest set to heat. Thermostat mode is always set to Heat in this case. ActiveThermostatMode is set to "heat" when the furance turns on. ActiveThermostatMode is set to "none" when the furance turns off since it reached the setpoint. The annoying part is that when you use the script editor autofill for ActiveThermostatMode there isn't a "none" value available so you can't use it in the script editor because it will throw an error. I used the isNot operator since I couldn't query for the HVAC fan on/off status and I couldn't figure out a way to compare the temperature setpoint and the ambient temperature .

metadata:
name: Fans OFF when Heat OFF
description: turn off fans when hvac heat is off
automations:
- starters:
- type: device.state.TemperatureSetting
device: Nest Thermostat - Hallway
state: activeThermostatMode
isNot: heat
actions:
- type: device.command.OnOff
devices: Fan - Office
on: false

metadata:
name: Fans ON when Heat ON
description: turn on fans when hvac heat is on
automations:
- starters:
- type: device.state.TemperatureSetting
device: Nest Thermostat - Hallway
state: activeThermostatMode
is: heat
actions:
- type: device.command.OnOff
devices: Fan - Office
on: true

topic Script Help for automatically turning on/off fan with thermostat state. in Home Automation

Script Help for automatically turning on/off fan with thermostat state.

Re: Script Help for automatically turning on/off fan with thermostat state.