BoilerFaultCodesYour boiler has detected that the part responsible for measuring the temperature of your heating water is no longer working correctly, causing the system to stop as a safety precaution.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fault on Central Heating Sensor
What causes this fault?
This fault occurs when the sensor responsible for monitoring the temperature of the water in your radiators develops an electrical defect or fails completely. This is usually caused by the internal components of the sensor wearing out over time or experiencing corrosion due to a small leak at the connection point.
This fault often comes to light in autumn or winter when the heating is turned on for the first time after summer, as the sensor is finally put under constant thermal stress.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like 28 — no call-out fees, no surprises.
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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