"dennis@home" wrote in message
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"Mark" wrote in message
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Hi,

My boiler shows the return temperature of the CH on its display.
Earlier today it was showing 75(C) which seems very hot. As it is a
condensing boiler won't this mean it is operating outside its
condensing mode?

Steam starts to condense at 100C.

You got right, which is irrelevant to this point.

Most of it will have condensed at 75C.

This totally irrelevant too.