Hi, i have a Boulter Buderus 500-28C combi that works off a Modulink 250RF wireless thermostat. The problem i am getting is the thermostat loses connection with the receiver on the boiler (red light on, should be green). This causes the boiler to periodically switch the heating off for no reason, also doesn't switch off after reaching set temperature and needs commands sending several times before it does as its told! If the boiler was set to come on at 8.00am it would sometimes take till 9.00am before it starts! There is a clear path between the thermostat and the boiler with a distance of about 7 meters. This problem is intermittent. Please help!
Buderus modulink 250 RF problem
- Thread starter steveholl
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Thanks for that. I guessed it might need replacing. Looks like £100 for the stat and receiver. Also I use the dhw preheat to save water, is this a common problem with the boiler?
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yep all to common unfortunately on 500's. Hydrobloc is plastic and the preheat causes it to split over a period.
Not had one yet that hasnt had this happen
your boiler ends up looking like this when trying to fix it.
View media item 10418
Not had one yet that hasnt had this happen
your boiler ends up looking like this when trying to fix it.
View media item 10418
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Hi Tony, yep tried new batteries thanks. If you try connecting to the receiver it finds it straight away. Its so annoying, the problem is intermittent so its 50/50 whether or not the boiler does as its told! I believe the stat sends a message out every half our or so, that means if the boiler doesn't start at a preset time then chances are it will start half an hour later.
yep all to common unfortunately on 500's. Hydrobloc is plastic and the preheat causes it to split over a period.
Not had one yet that hasnt had this happen
your boiler ends up looking like this when trying to fix it.
View media item 10418
Advice gratefully received. I've switched the preheat off!
But were they duracell?
Someone recently phoned me for similar advice ( I dont encourage this but I was driving so had time to help ).
He first told me had had put new batteries but it turned out they were not Duracell.
He texted later to say that had solved the problem.
They take a bit of currrent on transmit and cheap batts are inadequate.
Tony
Someone recently phoned me for similar advice ( I dont encourage this but I was driving so had time to help ).
He first told me had had put new batteries but it turned out they were not Duracell.
He texted later to say that had solved the problem.
They take a bit of currrent on transmit and cheap batts are inadequate.
Tony
I'll buy some top end Duracells and give it a go.
Thanks Tony
It may well be the unit, but for the sake of £2 of batteries which can be used on a replacment unit later, I would always try that first.
What would my customers say if I just replaced a part without properly testing it first!
What would my customers say if I just replaced a part without properly testing it first!
Hi Tony, just thought i'd let you know since putting the duracells in the stat a couple of days ago i've not seen the red light on the receiver. Boiler seems to be behaving properly. Massive thanks!
I appreciated ALL the posts. Its great to know that people can take the time to help others. Cheers
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