High Lockout
3 1. on Remeha Quinta Ace 45

Your boiler has stopped working because it has detected a fault with the internal sensor that monitors the temperature of the water leaving the unit.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Temp.sensor fault: Short-circuit in flow temperature sensor.

What causes this fault?

This fault occurs when the boiler's control board receives an incorrect electrical signal from the flow sensor, usually caused by an internal failure of the component itself. The most common reason is that the sensor has suffered an electrical short-circuit, which prevents the boiler from safely monitoring how hot the water is before it leaves the unit.

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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