BoilerFaultCodesTechnical description
The contacts of the boiler return temperature sensor have been short circuited
What causes this fault?
This fault occurs when the electrical signals from the sensor monitoring the return water temperature are disrupted, usually because the sensor has failed or become damaged. The most common reason is that the internal components of the sensor have worn out or a leak has caused moisture to corrode the electrical connections. Because the boiler can no longer accurately measure the water temperature coming back from your radiators, it shuts down as a safety precaution.
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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