Critical heating logic issue – boiler does not start according to schedule

[DJ6971 1]

After updating to version 5.200.8, a serious issue with the heating logic based on schedules and Fibaro thermostatic heads is still present.

Problem description (key issue):

• A Climate Zone schedule is set to a target temperature, e.g. 21.5°C

• The thermostatic head:

  • has a local setpoint of e.g. 20.0°C

  • does not automatically synchronize with the schedule

• In this situation:

  • the boiler does NOT start, even though the schedule requires 21.5°C

  • the boiler starts only when the actual temperature drops below the local head setpoint (20.0°C)

Manual synchronization (important):

• To temporarily restore correct behavior, it is necessary to manually force synchronization from the web interface (HC3), for example by:

  • manually changing the temperature on the thermostatic head

  • switching back to automatic / schedule mode

• This synchronization:

  • works only temporarily

  • after a few minutes, or after the next wake-up of the device

  • the thermostatic head becomes desynchronized again from the schedule

Impact:

• The Climate Zone schedule does not actually control heating

• The system decides whether to start the boiler based on the local setpoint of the thermostatic head, not the scheduled temperature

• This leads to situations where:

  • heating does not start despite scheduled demand

  • thermal comfort is not maintained

  • the user interface suggests the schedule is active, while in reality it is not

Additional observations:

• The issue frequently occurs:

  • after charging the thermostatic head

  • after communication loss / wake-up

  • after manual temperature changes followed by a return to automatic mode

• This is not a UI issue — the decision logic of the system is inconsistent

• The only workaround is:

  • repeated manual synchronization

  • or the use of additional LUA scenes (which should not be required when using schedules)

Conclusions:

• The Climate Zone schedule does not enforce a persistent update of the head setpoint

• Manually forced synchronization is not preserved over time

• Boiler start logic is based on the local thermostatic head setpoint, not the scheduled temperature

• This is a functional defect, not a configuration issue

Please advise:

• whether this issue is known to the development team

• whether a fix is planned where:

  • the Climate Zone schedule is authoritative over thermostatic head setpoints

  • and synchronization is persistent, not temporary

This is a core heating function, and the current behavior causes real-world usability and comfort issues.

[Jay Ess 6]

I am note sure if I have been having this exact issue where my climate was not sync to my heating controllers so i made a scene which runs every 5 min from 1 min past the hour as the climate has every 5 min slots and does this it is not the most elegant solution as this was written about 5 years ago when my coding skills were slightly more starter level then now, however it does the job and one day will look to maybe tighten it up a little, but i think this is what you are saying is a similar problem you have been having so if it is would be interested in a better solution  


--Only run this scene when set to HOME profile
local currentProfile = api.get("/profiles").activeProfile
if currentProfile ~= 1 then
    return
end
--If the trigger for this scene is a profile change then we want to wait 30 seconds to give the system a chance to change
if sourceTrigger.property == "activeProfile" then
    --put in 10 second delay
    fibaro.sleep(10000)
end
--Functions
local fmt = string.format
function str2sec(str) local h,m,s=str:match("^(%d%d):(%d%d):?(%d*)") return 3600*h+60*m+(s~="" and s or 0) end
function sec2str(sec) return fmt("%02d:%02d%s",math.floor(sec/3600),math.floor((sec % 3600)/60),sec % 60 > 0 and fmt(":%02d",sec%60) or "") end
--Setup locals
local currentDate = os.date("*t")
local currentTime = os.date("%H:%M")
local jT = json.decode(fibaro.getGlobalVariable("jHomeTable"))
local emailNotification = jT.User.****
local DownstairsClimateZone = jT.Climate.Downstairs
local UpstairsClimateZone = jT.Climate.Upstairs
local DownstairsHeating = jT.Hallway.Heating
local UpstairsHeating = jT.UpHallway.Heating
local DownstairsHeatingOverRideTimerVariable = tonumber(fibaro.getGlobalVariable("heatingOverrideDownstairs"))
local DownstairsHeatingOverRideStateVariable = fibaro.getGlobalVariable("heatingOverrideStateDownstairs")
local DownstairsHeatingSetpointEndTime = fibaro.getGlobalVariable("heatingDownstairsCurrentSetPointEndTime")
local UpstarirsHeatingOverRideTimerVariable = tonumber(fibaro.getGlobalVariable("heatingOverrideUpstairs"))
local UpstarirsHeatingOverRideStateVariable = fibaro.getGlobalVariable("heatingOverrideStateUpstairs")
local UpstairsHeatingSetpointEndTime = fibaro.getGlobalVariable("heatingUpstairsCurrentSetPointEndTime")
--Fetch the climate panel setting
local dPanel =api.get("/panels/climate/"..DownstairsClimateZone)
local dPanelSetpoint = dPanel.properties.currentTemperatureHeating
local dPanelMode = dPanel.active
local dPanelNextSwitchOver = string.format("%02d",dPanel.properties.currentSetpointTimeEndHour)..":"..string.format("%02d",dPanel.properties.currentSetpointTimeEndMinute)
local uPanel =api.get("/panels/climate/"..UpstairsClimateZone)
local uPanelSetpoint = uPanel.properties.currentTemperatureHeating
local uPanelMode = uPanel.active
local uPanelNextSwitchOver = string.format("%02d",uPanel.properties.currentSetpointTimeEndHour)..":"..string.format("%02d",uPanel.properties.currentSetpointTimeEndMinute)
--Fetch Thermostat set points
local DownstairsHeatingMode = fibaro.getValue(DownstairsHeating, "thermostatMode")
local DownstairsHeatingSetpoint = fibaro.getValue(DownstairsHeating, "heatingThermostatSetpoint")
local UpstairsHeatingMode = fibaro.getValue(UpstairsHeating, "thermostatMode")
local UpstairsHeatingSetpoint = fibaro.getValue(UpstairsHeating, "heatingThermostatSetpoint")

--test
--print(uPanel,uPanelSetpoint,uPanelMode,uPanelNextSwitchOver,UpstairsHeatingMode,UpstairsHeatingSetpoint)
--end of tests

--Always check that it is on heat mode
if DownstairsHeatingMode ~= "Heat" then
    fibaro.call(DownstairsHeating, "setThermostatMode","Heat")
    --fibaro.alert("email", {emailNotification}, "Downstairs Thermostat has been set to HEAT mode.")
end
if UpstairsHeatingMode ~= "Heat" then
    fibaro.call(UpstairsHeating, "setThermostatMode","Heat")
    --fibaro.alert("email", {emailNotification}, "Upstairs Thermostat has been set to HEAT mode.")
end
--Run when setting active profile to HOME
if sourceTrigger.property == "activeProfile" then
    print("Current Profile has triggered this scene")
    --we are on current profile is home so we want to make sure the heating is set correctly and reset any overrides.
    --we want to sleep for 30 seconds to give the heating controls to sync.
    if dPanelSetpoint ~= DownstairsHeatingSetpoint then
        print("Adjust thermostat DS")
        fibaro.call(DownstairsHeating, "setHeatingThermostatSetpoint",dPanelSetpoint)
    end
    if uPanelSetpoint ~= UpstairsHeatingSetpoint then
        print("Adjust thermostat US")
        fibaro.call(UpstairsHeating, "setHeatingThermostatSetpoint",uPanelSetpoint)
    end
    if DownstairsHeatingOverRideStateVariable == "true" then
        print("adjust downstairs variables")
        fibaro.setGlobalVariable("heatingOverrideStateDownstairs", "false")
        fibaro.setGlobalVariable("heatingOverrideDownstairs", tostring(0))
    end
    if UpstarirsHeatingOverRideTimerVariable == "true" then
        print("adjust upstairs variables")
        fibaro.setGlobalVariable("heatingOverrideStateUpstairs", "false")
        fibaro.setGlobalVariable("heatingOverrideUpstairs", tostring(0))
    end
    --we want to quit this scene after running this
    return
end

--check downstairs zone
if dPanelMode == true then
    if dPanelSetpoint > DownstairsHeatingSetpoint then
        if currentTime == DownstairsHeatingSetpointEndTime then
            fibaro.call(DownstairsHeating, "setHeatingThermostatSetpoint",dPanelSetpoint)
            fibaro.alert("email", {emailNotification}, "Downstairs Thermostat has been adjusted, from "..DownstairsHeatingSetpoint.." and is now set to "..dPanelSetpoint.."This alert gets triggered if the current time is 1 minute after the climate change time for this zone and the heating has not adjusted itself to the climate zone setting.")
        end
    elseif dPanelSetpoint < DownstairsHeatingSetpoint then
        if currentTime == DownstairsHeatingSetpointEndTime then
            fibaro.call(DownstairsHeating, "setHeatingThermostatSetpoint",dPanelSetpoint)
            fibaro.setGlobalVariable("heatingOverrideStateDownstairs", "false")
            fibaro.setGlobalVariable("heatingOverrideDownstairs", tostring(0))
            fibaro.alert("email", {emailNotification}, "Downstairs Thermostat has been adjusted, from "..DownstairsHeatingSetpoint.." and is now set to "..dPanelSetpoint)
        else
            if DownstairsHeatingOverRideStateVariable == "false" then
                fibaro.setGlobalVariable("heatingOverrideStateDownstairs", "true")
                fibaro.setGlobalVariable("heatingOverrideDownstairs", "12")
                --fibaro.alert("email", {emailNotification}, "Downstairs Thermostat has been set to Override Mode, and Counter Timer is set to 12")
            else
                if DownstairsHeatingOverRideTimerVariable > 0 then
                    print(DownstairsHeatingOverRideTimerVariable,"DownstairsHeatingOverRideTimerVariable value line 104")
                    fibaro.setGlobalVariable("heatingOverrideDownstairs", tostring(DownstairsHeatingOverRideTimerVariable-1))
                    --fibaro.alert("email", {emailNotification}, "Downstairs Thermostat has been set to Override Mode, and Counter Timer is set to "..tostring(DownstairsHeatingOverRideTimerVariable-1))
                else
                    fibaro.setGlobalVariable("heatingOverrideStateDownstairs", "false")
                    fibaro.call(DownstairsHeating, "setHeatingThermostatSetpoint",dPanelSetpoint)
                    fibaro.alert("email", {emailNotification}, "Downstairs Thermostat has been adjusted, from "..DownstairsHeatingSetpoint.." and is now set to "..dPanelSetpoint)
                end
            end
        end    
    elseif dPanelSetpoint == DownstairsHeatingSetpoint then
        if DownstairsHeatingOverRideStateVariable == "true" then
            fibaro.setGlobalVariable("heatingOverrideStateDownstairs", "false")
            fibaro.setGlobalVariable("heatingOverrideDownstairs", tostring(0))
        end
    end
end

--test code
--print(uPanelMode,uPanelSetpoint,UpstairsHeatingSetpoint,currentTime,UpstairsHeatingSetpointEndTime)
--end test

--check upstairs zone
if uPanelMode == true then
    if uPanelSetpoint > UpstairsHeatingSetpoint then
        if currentTime == UpstairsHeatingSetpointEndTime then
            fibaro.call(UpstairsHeating, "setHeatingThermostatSetpoint",uPanelSetpoint)
            fibaro.alert("email", {emailNotification}, "Upstairs Thermostat has been adjusted, from "..UpstairsHeatingSetpoint.." and is now set to "..uPanelSetpoint.."This alert gets triggered if the current time is 1 minute after the climate change time for this zone and the heating has not adjusted itself to the climate zone setting.")
        end
    elseif uPanelSetpoint < UpstairsHeatingSetpoint then
        if currentTime == UpstairsHeatingSetpointEndTime then
            fibaro.call(UpstairsHeating, "setHeatingThermostatSetpoint",uPanelSetpoint)
            fibaro.setGlobalVariable("heatingOverrideStateUpstairs", "false")
            fibaro.setGlobalVariable("heatingOverrideUpstairs", tostring(0))
            fibaro.alert("email", {emailNotification}, "Upstairs Thermostat has been adjusted, from "..UpstairsHeatingSetpoint.." and is now set to "..uPanelSetpoint)
        else
            if UpstarirsHeatingOverRideStateVariable == "false" then
                fibaro.setGlobalVariable("heatingOverrideStateUpstairs", "true")
                fibaro.setGlobalVariable("heatingOverrideUpstairs", "12")
                --fibaro.alert("email", {emailNotification}, "Upstairs Thermostat has been set to Override Mode, and Counter Timer is set to 12")
            else
                if UpstarirsHeatingOverRideTimerVariable > 0 then
                    --fibaro.debug("Scene103", UpstarirsHeatingOverRideTimerVariable)
                    print(UpstarirsHeatingOverRideTimerVariable,"UpstarirsHeatingOverRideTimerVariable value line 146")
                    fibaro.setGlobalVariable("heatingOverrideUpstairs", tostring(UpstarirsHeatingOverRideTimerVariable-1))
                    --fibaro.alert("email", {emailNotification}, "Upstairs Thermostat has been set to Override Mode, and Counter Timer is set to "..tostring(UpstarirsHeatingOverRideTimerVariable-1))
                else
                    fibaro.setGlobalVariable("heatingOverrideStateUpstairs", "false")
                    fibaro.call(UpstairsHeating, "setHeatingThermostatSetpoint",uPanelSetpoint)
                    fibaro.alert("email", {emailNotification}, "Upstairs Thermostat has been adjusted, from "..UpstairsHeatingSetpoint.." and is now set to "..uPanelSetpoint)
                end
            end
        end
    elseif uPanelSetpoint == UpstairsHeatingSetpoint then
        if UpstarirsHeatingOverRideStateVariable == "true" then
            fibaro.setGlobalVariable("heatingOverrideStateUpstairs", "false")
            fibaro.setGlobalVariable("heatingOverrideUpstairs", tostring(0))
        end
    end
end
--set Next change over time
--fibaro.debug("Scene103", sec2str(str2sec(dPanelNextSwitchOver)+(1*60)))
fibaro.setGlobalVariable("heatingDownstairsCurrentSetPointEndTime", sec2str(str2sec(dPanelNextSwitchOver)+(1*60)))
fibaro.setGlobalVariable("heatingUpstairsCurrentSetPointEndTime", sec2str(str2sec(uPanelNextSwitchOver)+(1*60)))

[Gonia 5]

Hello @DJ6971,

thank you for your report. Please verify whether the device was added with a security level. If yes, please try adding the device without a security level.

We are currently investigating the issue on our side.

Best regards,  
Gonia  
Fibaro Team