BoilerFaultCodesTechnical description
Tank NTC short circuit
What causes this fault?
This fault occurs when the electrical signal from the hot water cylinder's temperature sensor reaches an impossibly high level, usually because the internal wiring has failed or touched together. The most common reason is that the sensor has developed a 'short circuit' due to age or moisture, or the delicate wires connecting it to the boiler have been pinched or damaged.
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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