What the manual says
Manufacturer manualIlluminates if the circulating pump is faulty or the system pressure drops below the minimum requirement (0.2 bar).
From this model's manual
Verified against the Baxi/Baxi System 35 60 60 100 installation & service manual.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 14 fault codes on the System 35/60 / 60/100
Seeing a different code? Every code this model can display, in one place.