CH Boiler Problem

I have an Alpha CD 32C Boiler and a wireless controller in the hall
which is fitted with a rad which has no TRV .Tonight I happened to
notice that this rad was cold at the top so I bled it and there was
quite a lot of air in it for some reason .
Later on I suddenly realised the flat was getting chilly and on
investigating I found that the controller was calling for heat but
that the rads were all cold .I went to the boiler and it wasn't
providing heat and the pressure was showing as zero and the warning
lights were showing ....I didn't note what the sequence was but I
think it was the sequence that means a low pressure .I topped up the
pressure and everything seems fine now .
It seems too much of a concidence that my bleeding this rad would not
have anything to do with the boiler stopping to operate but I cannot
understand why that would be and I like to know reasons for things
happening .
Anyone suggest what has gone on here .
Reply to
Stuart B
It is quite possible it was bled, but more air collected in it after. With a fresh fill of water it can take some days for all of the air to come out of suspension. The other possibility is you have insufficient (or no) corrosion inhibitor in the system and what you bled was hydrogen gas produced as a corrosion by product and not air.
Reply to
John Rumm
How do you prove your usefulness in the house if you are not going around checking and bleeding the radiators every few days?
Reply to
But would all the air be in only one rad if that was the case ?
There was sufficient inhibitor put in the system as I was there when it was put in and know how much of the container he used . Stuart
Reply to
Stuart B
That is quite often the case - often the highest rad in the system, or the first one etc, but it seems common to get one that favours collection of gas more than the others.
Jolly good. At least with sealed system then you won't have any problems with pumping over which can draw more air in.
Reply to
John Rumm

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