some information on the worcester combi boiler
- Thread starter sunny68
- Start date
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u9 is a blocking stage where the boiler is protecting itself. It means the primary temp has reached 109 degrees and so the boiler switches the burner off until such time the temp measured within the boiler drops.
Is there air in the system?
whats the pressure...is it at 1-1.5 bar?
Is the pump running?
Is there air in the system?
whats the pressure...is it at 1-1.5 bar?
Is the pump running?
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