High
E10 on Remeha Avanta Plus 28c

Your boiler has detected that the water pressure in the central heating system is too low for it to operate safely.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Pressure too low/Pressure sensor error (S4): CH water pressure too low or faulty sensor

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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