I have a Ferroli 25c combi boiler. It normally starts at 1.5 bar and rises to 2 bar when running the central heating. Yesterday the pressure has risen to over 3 bar (the prv has not kicked in) and stayed there. The filling loop is definitely closed. What could cause this please?
rising boiler pressure
- Thread starter paul9367
- Start date
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Stingray, thanks for the reply.
because I have quite a large system a previous engineer already added an additional expansion vessel to the system.
Wouldn't this kick in or could both have failed at the same time?
because I have quite a large system a previous engineer already added an additional expansion vessel to the system.
Wouldn't this kick in or could both have failed at the same time?
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