BoilerFaultCodesTechnical description
Compressor Stall Error
What causes this fault?
This fault occurs when the main pump inside the unit attempts to start but becomes stuck or cannot maintain enough power to keep running. It is often caused by an electrical failure in the control board or a physical blockage that prevents the internal mechanism from spinning freely.
This issue is more frequent during extreme cold snaps when the system has to work much harder to start up against high pressure.
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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