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Questions tagged [combi]

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How can I figure out if a Combi Boiler will be adequate for my house?

We recently moved into our new home that currently has a Super Hot MG-100 Hydronic Boiler (installed in 1986, when the house was built). Clearly, it's done its job and in need of a replacement. We had ...
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Combi boiler pressure drop - even after expansion vessel has been emptied and recharged

Recently had an issue with my ~5 year old Baxi Platinum HE 24 combi boiler. Pressure had dropped and needed topping back up 3 times a day to retain pressure and not get any errors. Got a heating ...
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Valiant Boiler - 3 months old

In September I had a Valiant boiler fitted in my 2 bedroom house. It hasn’t worked properly ever since. Every time I put the heating on my pressure drops from 1.5 to 0.3 bars and I get the spanner ...
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Boiler not modulating when using DHW

My combi boiler when I'm using DHW is behaving on/off (making annoying fluctuations in DHW temperature) but modulates when I run my heating system. What's wrong with it? My boiler is a Hermann (now ...