BoilerFaultCodesTechnical description
Return sensor short circuit – check connections to return sensor
What causes this fault?
This fault occurs when the boiler's control board receives an incorrect electrical signal from the sensor that monitors the temperature of the water coming back from your radiators. The most common reason is that the sensor has suffered an internal electrical failure or the wiring connecting it to the main board has become damaged or loose.
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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