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Thread: Will Honeywell EVER acknowledge problems with the CS92?

  1. #11
    Automated Home Ninja Dan_Robinson's Avatar
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    Quote Originally Posted by DBMandrake View Post
    So no reports of hot water overshoots then ? How would you know ?



    For those of us who have experienced this problem .........

    Most of my installations are not fit and forget. I even have access to several. Whilst I do get the occasional problems with Comms errors, I can't think of any that have inherent overshooting that can't be logically explained.

    Quote Originally Posted by Cchris View Post
    Clearly I, and the others reporting this fault on various threads here are making it up then.

    Just because the issue is not common does not negate its existence.
    You and various others are a statistically insignificant number in the grand scheme I'm afraid.

    More likely there is an issue specific with the units, or their installation.
    Kind Regards - Dan Robinson (Jennings Heating Ltd)

  2. #12
    Automated Home Ninja Dan_Robinson's Avatar
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    Quote Originally Posted by Edinburgh2000 View Post
    Agreed. I have given up worrying about my CS92 and accept that there are regular overshoots, mainly in the winter. Because my DHW valve is wired in series with a mechanical thermostat in my cylinder, the overshoots are limited to about 62oC and so no-one in the house seems to mind very much. The water just seems a bit hotter than usual for a while. I am sure no customer would call their installer to get anything changed just because of that and so installers are unlikely to be aware of this shortcoming. I maintain that the CS92 is a poor piece of kit and I wish Honeywell would produce a mains-powered replacement that could give more frequent and regular signals to the controller. I would not trust my CS92 on its own to control my hot water temperature.

    I agree a mains powered option would be much better. But trust me..... People will phone up..... Microanalysis and misunderstanding things is one of the pitfalls of evohome. I can spend as long explaining things as I do fitting the stuff with some people.
    Last edited by Dan_Robinson; 6th March 2018 at 05:30 PM.
    Kind Regards - Dan Robinson (Jennings Heating Ltd)

  3. #13
    Automated Home Legend paulockenden's Avatar
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    Quote Originally Posted by DBMandrake View Post
    I thought when you checked your Domoticz logs a while ago you saw evidence of hot water overshoots ?

    Or do you just mean you haven't had any cases of hot water failing to heat up at all or comms errors reported on the controller fault log ?.
    I meant I’ve not seen the issue reported at the start of this thread, which appears to be different from the overshoots.

  4. #14
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    Don't have a CS92, but I do get a lot of communication errors on modules that are two stories up from the main controller (HR92 and T87RF). This issue is not restricted to the Evohome installation though. I get similar errors on the mechanical ventilation unit that is also running on 868 MHz. The cause is quite clear, it is the steel reinforcement in the concrete floors of my 2010 home that is creating disturbances. While this doesn't appear to be too bad on the first floor (WiFi speed is affected though) it gets really bad on the top floor (WiFi is non-existent there) and this is where the technical installations are. Which in my case is just the MV as I am on city block heating for which I only need to operate a valve that is on ground level.

  5. #15
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    This morning, no hot water for the first time since fitting the evohome around a year ago. I've done all of the 'fixes' I've found on here but now my problem doesn't seem to have been covered, or I can't find it mentioned.

    The CS92 is correctly bound. My hot water is set to 54 deg in the system parameters. The hot water is set to 'on'. The displayed temp will not go above 24 deg (was at 19 deg when it failed this morning). The water from the tap is 24 deg, maybe less. There is no demand on the boiler, even though the controller tells me that the hot water is on. I can turn the heating on and the boiler fires up just fine.

    I've also just noticed that the controller has self-cleared the fault log. There were lots of communications failrures that I hadn't been aware of. It seems that they usually fixed themselves.

    Is there something else I can do or is my CS92 knackered? Had I best go turn the immersion heater on (defeating the whole object of energy/money saving by using the evohome)?
    ukEvo 'cos I'm an Evans.

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