Indicator Hot Water

Indicator Hot water
Indicator Hot water
Screwed up old plumbing?


My house is old, my plumbings old, but there seems to be an extremely weird problem. Can somebody tell me if there is a logical cause for this?

Every time in the middle of my shower, the water turns suddenly hot. The water temperature indicator thingy is not changed, I know this because all the water is not changing hot, but the cold water stops coming and its all hot water. Is there a reason that it happens randomly in the middle of usage?

It would have to be a toilet! Water is slowly draining into bowl and and when back tank gets low it has to refill itself. To check this you simply put a drop or two of food colouring into bowl, then leave it for a while to see if it runs clear. This happens in many homes without any one noticing!

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The red light is flashing (Fast Flash - 5 per secnd) on the hot water indicator for my Worcester 24cdi boiler?


The red light is flashing on the hot water indicator (D.H.W Demand Indicator) for my boiler which is a Worcester 24 cdi. The Hot water and the central heating are both not working. Any advice of what checks i could make before calling out for a plumber ?

Thanks

According to this: http://www.worcester-bosch.co.uk/cache/file/186/user-instructions---customer-care-guide.pdf

... it is:
"Air flow fault (RSF). Flue gas spillage"

I feel confident you should call a serviceman (engineer).

On edit:

Lots of potential causes: bad combustion fan; faulty pressure switch; bad spill switch; blocked/damaged flue; inadequate make-up air.

This isn't a common error that will have a simple fix.
.

Regards.