# Bug in combination of Vthermo + Homey Heating Scheduler?
**URL:** https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968
**Category:** Apps
**Created:** [February 16, 2020, 1:03pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968 "2020-02-16T13:03:33Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Eternity](https://community.homey.app/u/Eternity)
#### Post date: [February 16, 2020, 1:03pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/1 "2020-02-16T13:03:33Z")
I use the [VThermo App](https://homey.app/nl-nl/app/no.almli.thermostat/VThermo/) by @balmli with the [Homey Heating Schedule](https://homey.app/nl-nl/app/app.mskg.homey-heating/Homey-Verwarmingsregelaar/) App by @Markus to control my house heating.
The main flow checks every 15 minutes if one or more VThermo’s are switched ON:
Here, one of the VThermo’s is in ON state:
However, if I execute the flow manually, all the AND conditions are false!
I checked the setting of the VThermo’s. No delay / changed hysteresis or other modifications. They do switch state from Blue to Black and Red, indicating the status.
If I manually increase the temperature of the VThermo to an extreme value - say to 28 degrees - the flow does work; the VThermo is seen as ON and the flow triggers the heating.
Bug?
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### Author:  [@balmli](https://community.homey.app/u/balmli)
#### Post date: [February 16, 2020, 2:18pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/2 "2020-02-16T14:18:02Z")
You can check the state from [https://developer.athom.com/tools/devices](https://developer.athom.com/tools/devices)
Search for the VThermo, and look at the vt\_onoff - capability.
The VThermo switches if the temperature is outside the hysteresis area. So, the color can be red even if the termostat is cooling down, and vice versa. Check the vt\_onoff - capability 🙂
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### Author:  [@Eternity](https://community.homey.app/u/Eternity)
#### Post date: [February 16, 2020, 2:49pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/3 "2020-02-16T14:49:31Z")
Thanks for the reply!
So, if the hysteresis is set to zero, only the interval time between measuring the setpoint versus measured is a variable?
Is it possible to make the visual state and the capability state match better?
The ‘lag’ happens with both switching ON, and OFF.
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### Author:  [@balmli](https://community.homey.app/u/balmli)
#### Post date: [February 16, 2020, 3:07pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/4 "2020-02-16T15:07:19Z")
The vt\_onoff - capability is correct.
The visual indication for the thermostat in the mobile app, black/blue/red, does not reflect this state. Nothing I can do about this… and it doesn’t matter much…
I think it would be better for you to use “Thermostat turned on” and “Thermostat turned off” - triggers., than updating every 15 minutes.
Don’t think setting the hysteresis to zero is good. Then the VThermos will switch too often…
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### Author:  [@Eternity](https://community.homey.app/u/Eternity)
#### Post date: [February 16, 2020, 3:12pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/5 "2020-02-16T15:12:12Z")
> [@balmli](#):
>
> I think it would be better for you to use “Thermostat turned on” and “Thermostat turned off” - triggers., than updating every 15 minutes.
I agree, but I have different rooms that need to be checked and two different heaters. But, good point! I will think about a different approach!
I will correct the hysteresis to the standard setting!
Thanks for your explanation!
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### Author:  [@Eternity](https://community.homey.app/u/Eternity)
#### Post date: [February 16, 2020, 3:19pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/6 "2020-02-16T15:19:27Z")
One more question 😅
If I check the developer settings, I see that the setpoint is higher than the measured temperature, but the capability is still ‘false’. When will it switch to True?
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### Author:  [@balmli](https://community.homey.app/u/balmli)
#### Post date: [February 16, 2020, 8:47pm UTC](https://community.homey.app/t/bug-in-combination-of-vthermo-homey-heating-scheduler/25968/7 "2020-02-16T20:47:42Z")
When the diff is larger than the hysteresis it will trigger…
And here I guess you have hysteresis = 0.5.