Tado X system firing heating on/off incorrectly
Hi community, looking for an idea on whether I have a hardware issue or if there's a bug with the firmware.
Setup:
- S Plan system
- 1 Tado X Programmer X with Hot Water Control and OpenTherm
- 1 Wireless Temperature Sensor X
- 1 Smart Radiator Thermostat X
I've found that the system works fine 80-90% of the time, it's definitely wired correctly also (has been installed nearly 2 months and was installed professionally by an electrician), but then the system does seem to signal to turn off heating (and close the motorised valves etc.) say every 10-15 minutes, I hear the heating firing back up and valves reopening. Looking in the app, it's up to temperature, often exceeding the target by say 0.5 degrees but still showing either 1 or 2 wavy lines on the heating icon. Not only is this really annoying, it's un-necessarily turning on and off the boiler and makes me think the tado system is unreliable.
I have the thermostats connected via Matter in Home Assistant but do not control it from there; it's just for the data. Everything runs on a schedule in the app; the schedule for both thermostats is identical intentionally. As you can see from the screenshots it's not as though one thermostat is below and one above temperature; both are above, but keep firing the system on/off intermittently.
Any thoughts appreciated!
Answers
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Hey, I've noticed something similar with the system and to me it sounds like a software issue with Tado X.
When I had encountered such situation, I had reset the room thermostat and typically once back on the system would then recognise that the temperature is above the setpoint and not call for heat anymore.
Out of curiosity - would you be able to check if the reset works for you too, please?
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Thanks @SamuraiJack yes I happen to have tried resets previously and that seems to help it for a couple days. Do you regularly reboot/reset the thermostat as a workaround? I've rebooted it now and seems fine so far, will keep an eye how long it takes for it to start being problematic again.
Seems like there's definitely a bug somewhere that Tado need to investigate and fix
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Thanks for checking, so at least it proves that it's definitely a software issue then.
Would be good for Tado to look into it. @Emcee is this something that could be flagged up to the development team, please?
@lee_s in my instance I only reset those temperature sensors, when I see that those overshoots start to go above a certain level.1 -
@lee_s
You originally started that your setup had the following features:
S Plan system
1 Tado X Programmer X with Hot Water Control and OpenTherm
1 Wireless Temperature Sensor X
1 Smart Radiator Thermostat X
Here's an odd thing. No mention made of a wired tado thermostat. Was that intentional or an omission? It might explain why you are getting the results you see.0 -
Hello @policywonk, this is with the following Tado starter kit, so there isn't a wired tado thermostat. The wireless thermostat is in the same place as the old wired thermostat was, this was disconnected/isolated.
The "Wireless Receiver X Manual (UK)" professional installer manual has been followed and is wired accordingly as it's the receiver effectively taking the place of both the old programmer and wired stat.
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Just a note that I've observed this happening again so less than 24hrs. Room stat exceeding temperature, had closed the valve but app still shows calling for heat. Restarted the room stat (holding down middle button for 6 seconds) and it's resolved it for now.
Definitely a bug somewhere! Not overly impressed with the system so far as a result.
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This is serious.
- Do check that the zone valve is being rolled open and shut at the right times (test it to be sure). If you are sure, it seems that communication between the smart TRV and the wireless receiver isnt moving at an acceptable speed. Technically not fit for purpose.
- Contact support. If they dont give you a constructive position within a tolerable time frame, contact the retailer which sold you that kit and ask for a replacement kit.
- Fit it and if you have the same problem, or something else gets in the way, come back here. Will keep you on my watch list.
We arent Tado staff, just end users who've worked through stuff, but we can help move things sometimes.
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Thanks @policywonk ! I have reached out to support so will see. Regarding the zone valve it does seem that the "smart" programmer is firing it on and off intermittently when this happens for example 17:11 closes the valve and stops calling for heat. Then 17:15 fires up boiler again and reopens valve. Good plan about replacement kit if need be
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Keep us informed. Support has the capacity to run data on whats happens at the thermostat and at the wireless receiver. Just for information: whats the exact model of boiler?
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Absolutely - it's a Worcester Greenstar 30Ri (Compact)
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@lee_s. That boiler is controlled normally in EMS-BUS mode (or what Tado call HT-BUS, D17 mode), or in Relay mode (Tado's R01 mode).
- Now- the drawing you presented above suggests it is controlled in Relay mode.
- Then, am confused here, you stated the Hot Water is run with Opentherm. The drawing is set up for Relay mode on Hot Water. Is that actually an Opentherm sensor on your Hot Water cylinder, being wired in to drive things in Relay Mode?
I presume you are aware that Tado X series doesnt operate in HT-BUS mode. Were you intending to operate the boiler in Relay Mode, EMS-BUS mode, or Opentherm mode?
Someone in Support should be studying the signals and may be facing similar questions.
Do come back, if you believe this may be helping.
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@policywonk Apologies for the confusion but that is just the product name of the starter kit. Opentherm is not being used (it is just in the name of the exact starter kit being used) so the hot water is definitely relay based also.0
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It could be the Homekit being engaged. However I would make it plain that boiler cycling in Relay mode is nonsense. Make sure Support get that message.-1
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Unfortunately support have not been useful at all so far. Well, they've confirmed that it is a limitation of the X series devices…
Regarding the boiler turning on/off too often, At this time, we regret to inform you that we do not have any options available to modify the relay behavior. However, I have linked your case to our internal tracking list so that our engineering team can reference your specific setup when working on a solution.
As for the replacement, unfortunately because the device is not actually faulty a replacement is not possible. The behavior will be the same with a new device.
I'm going to return my radiator thermostat as that is just still within the returns window.
Absolutely shocking that Tado have released the X series devices which are clearly not ready for market. Really disappointed.
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Sorry @lee_s. Dont think we can change that response - it seems to reflect a policy decision.
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No worries @policywonk I appreciate all of your help!
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