BoilerFaultCodesYour boiler has detected that the temperature sensor used to monitor the water inside the unit is broken or sending incorrect signals.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Boiler sensor fault detected by diagnostic feature.
What causes this fault?
This fault occurs when the internal electronic sensors can no longer accurately measure the temperature of the water moving through the boiler. The most common reason is that the sensor's internal resistance has failed due to age or heat stress, but it can also be triggered by loose or corroded electrical connections between the sensor and the main control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Boiler sensor — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Ideal Concord CXC 48 116 is discontinued — time for a new one?
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.
Affiliate links — we may earn a commission at no extra cost to you.