BoilerFaultCodesWhat the manual says
Manufacturer manualCylinder temperature sensor (NTC) not recognized
From this model's manual
Verified against the Worcester Bosch Wr325 Rsf installation & service manual.
What causes this fault?
This fault occurs when the boiler's main control board loses the electrical connection to the sensor responsible for monitoring your hot water tank’s temperature. The most common reason is that the sensor itself has developed an internal fault or the wiring connecting it to the boiler has become loose or damaged over time.
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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