What the manual says
Manufacturer manualVenting the installation
From this model's manual
Verified against the Heatline Caprizplus 24a installation & service manual, page 27.
DIY fix possible
Wait 5-10 minutes for the automatic cycle to completeCheck your system water pressure on the boiler gaugeIf the code persists, restart the boiler by turning it off and back on at the fused spur
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