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I have a box in the airing cupboard which I don't recognise. The box has two LEDs and one button. The bottom LED is flashing red. The other LED is off. See attached photo.
The original boiler was replaced about 5 years ago with a Valliant ecoTEC plus 415, but it looks as if the original Honeywell timer (ST6400C?) has been retained. I think the hot water cylinder was replaced about 2 years ago, but I don't have any info about it.
Looking around the internet, I suspect the mystery box might be a Honeywell BDR91 wireless relay box. Does that sound correct? If so, what does it do?
Do I need to worry about the red flashing LED? What does it mean?
The original boiler was replaced about 5 years ago with a Valliant ecoTEC plus 415, but it looks as if the original Honeywell timer (ST6400C?) has been retained. I think the hot water cylinder was replaced about 2 years ago, but I don't have any info about it.
Looking around the internet, I suspect the mystery box might be a Honeywell BDR91 wireless relay box. Does that sound correct? If so, what does it do?
Do I need to worry about the red flashing LED? What does it mean?