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Find clear guides to boiler error codes, common faults and everyday problems, with simple steps to pinpoint the cause and fix it faster. Save time with practical help that explains what each warning means and how to act without guesswork. Ideal when you need a quick, easy solution and want to get your boiler working again.
The fault points to the room sensor and usually requires checking the connections or replacing the sensor.
The D12 alarm usually indicates a fault in the room sensor or its connection.
The boiler indicates a fault in the room sensor. These are the causes, the scope, and the appropriate professional inspection.
The fault is usually due to a communication failure between the SCU board and the module; checking the connectors is key.
The fault indicates an error in the accumulator probe and compromises the backup heating.
The alert usually indicates a faulty or improperly connected pool probe, with the system heating uncontrollably.
The warning points to accumulator 2’s probe and usually calls for a technical inspection of the connections and sensor.
A blockage between electronic boards leaves the boiler out of service and requires a precise technical reading.
A lockout due to repeated resets requires a quick inspection of the boiler before attempting more restarts.
The fault cuts off domestic hot water and indicates a short circuit in the TAS system.
The fault cuts off the hot water and leaves the accumulator unprotected. This is how the failure works and what to check.
Fault D99 indicates an incompatibility between control modules and requires specialized technical review.