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Improve Care&Protect boiler fault detection

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The problem i encounter is easy to explain. If for example my TADO is programmed to turn my boiler on (be it automatically or manually), and for whatever reason the boiler is either Off or the mains is down, TADO doesn’t inform that the boiler isn’t on. 


In this second report I have sent, the boiler was resetting itself due to a failure, and the only way I found out that something was wrong was because after more than an hour i still wasn’t getting heat from the radiators. The display in the TADO app was registering the normal heating process. Check the graph on the server for 10/02/2021 and you can see that the process started at 16:22, and I discovered the problem at 17:31, but during this lapse of time the app shows the three waves symbols indicating that the burner is working.


The first report I sent was due to an unknown mains failure in the boiler room with the same result from my TADO. En my old wired thermostat indicated when the boiler wasn’t turning on.

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  • Please consider the following:

    If a device calls for heat but the measured temperature hasn’t increased by X degrees within X minutes then send a notification.


    The rationale behind this is that if there is no rise in temperature then there is probably a problem with the boiler. Typically this could be a pressure drop such as a leak somewhere in the system. This enhancement could give early warning of such an issue and possibly prevent serious water damage to flooring etc. Ideally this would be configurable on a per room basis to help minimise the number of false alarms.

  • Definitely agree something like this would be useful. It should be relatively easy to save a temperature when a TRV calls for heat and then x minutes later check if the heat is higher and if it's not send a notificiation that there might be an issue with the boiler

  • Timm
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    Great idea. May have alerted me earlier to a large leak in pipes
  • mbeltoft
    edited February 2021
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    Yes this is important. I had my boiler fail in the middle of night 2 times this winter resulting in a freezing house in the morning. However Tado happily thought it was heating regardless of the temperature going down. It should be easy to see that something is wrong if the heating is full on and the temp is not going up and then send a notification.
  • Jurian
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    I have renamed this thread, since we do have the care&protect feature but it might not always detect a boiler fault.


    How it works: If tado is calling for heating, but the temperature does not go up, it will detect a fault.


    This also means that it won't be able to detect a fault when tado is not requesting heat.


    Furthermore, there are many occasions where the temperature does go down even when tado is requesting heat (leaving a window/door open etc..) and we also do not want to have too many false positives driving our customers crazy with a lot of notifications.

  • @Jurian

    In my case the boiler had shut down in the middle of night but as it is winter the heating was on so tado was calling for heat.

    When i woke up in the morning i could see on the room stats what time the rooms started to get colder.

    tardo had registered the temp drop and sat all valves to 100% but the temp kept going down for around 4 hours until i had a chance to reset the boiler. after the reset the temp got back to normal.

    but in the about 4 hours i had the boiler fail care & protect reported everything OK.

    I would expect that it have given me an alarm after about 30 minutes after the call for heat hadn't given any rise in room temp.

  • Jurian
    Jurian Admin
    edited February 2021
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    @GrayDav4276 Sorry for misunderstanding.


    In that case, I believe that there is already a topic open for your request:

    https://community.tado.com/en-gb/discussion/2515/notification-when-device-looses-connectivity#latest

  • Hey_youth
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    I have a non-WiFi connected (dumb ?) boiler. When the boiler fails to ignite for whatever reasons, it is possible to see from the history of each radiator thermostat that the temperature in each respective room is still falling whilst the thermostat ‘demand’ is on and increases as the temperature drops.

    The proposal is that the Tado app recognises that: 

    if heating ‘demand’ continues AND the temperature in the room continues to fall in one or many of the designated monitored room thermostats, then a notification is sent to the User to check the boiler.

    The point at which the notification is sent could be User configurable to avoid local variations triggering false notifications. i.e. the difference between ‘demand’ temp. & notification temp could be between 1-5deg C.

    This may take a while, possibly an hour or so to receive a notification but would be useful before the temperature of the rooms becomes more noticeably colder and for notification of heating failure when away from home.

  • xfield
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    I concur with this. From the graphs for all rooms, I can see the boiler failed five hours ago. Care&Protect reports that all rooms are heating at 100%, and no problems have been detected. At what point would it consider it to be a fault?

  • MED
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    I had the same issue and to be honest I was expecting care&protect to detect a failed boiler that isn't heating for almost 7 hours although all smart radiator thermostats are fully open in this period.

    I understand that a room temperature may not be increasing (or going down) even the radiator thermostat is open in case an open window is causing this issue. But the algorithm should be smart enough that ALL of the rooms cannot have an open window right?

    Looks like the care&protect isn't as smart as it should be. I really wonder what type of anomalies this function catches if it can't catch this simple one.

  • MED
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    @Jurian is tado doing an investigation on this? Looks like the care and protect algorithm isn’t working as it’s supposed to work
  • Jurian
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    @MED I would suggest you contact our support with your specific case. Make sure you include the room name of the room that was calling for heat and include the exact dates and times.


    That way, our development team could look into your case to see if the algorithm can be optimised.

  • pfmc
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    what about actually reading error codes?
    my boiler provides a comprehensive list of them, I will be glad to send them to you.

    Pressure drop, gas failure, ignition failure, or other stuff, why not read them and push notifications?
  • xfield
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    Two years later and my boiler has developed another fault (thankfully under warranty). I've had three instances this weekend where the boiler has cut out late evening, and all room graphs show a fall in temperature (I have trvs and room stats in 12 rooms). The only warning I receive is me waking up cold! Care and protect is simply a picture in the app, it genuinely doesn't do anything! All tado has to do is notify me that over the last two hours it hasn't detected any temperature rise in any room and there might be a problem. It could even have the facility to mark as false positive or turn off the feature if it proves to be a nuisance.