BoilerFaultCodesTechnical description
Short circuit in tank sensor | Cause: NTC defective, earth leak/short circuit in cable loom, damp plug connection
What causes this fault?
This fault occurs when the electrical signal from the hot water tank sensor is interrupted or fails to reach the boiler's control board. The most common reason is a physical breakage in the sensor’s internal wiring or moisture getting into the electrical plug, which confuses the boiler and prevents it from heating your water.
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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