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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 boiler protects itself when faced with an inconsistent temperature reading. These are the most common causes and the checks that can help.
A sign of excessive return temperature, with the sensor and wiring as the main suspects during diagnosis.
The fault indicates a return temperature that is too low: common causes, useful checks and when to call in a technician.
The alert indicates a fault in the return sensor and is usually linked to a connection, cable, or sensor issue.
The boiler locks out due to overheating, and the sensor is often at the heart of the problem.
The boiler goes into protection mode due to an abnormal temperature reading: origin, signs and when to intervene.
The boiler reports a failed temperature reading in the hot water cylinder. Here's how to interpret D17 and when a technician is needed.
The fault cuts off the DHW and leaves the storage tank without protection. Here's how to identify the fault and the point worth checking.
A lockout caused by repeated resets calls for a brief, methodical check before calling a technician.
The fault indicates a communication failure between boards and requires symptoms, causes, and limitations to be interpreted correctly.
The alert points to storage tank 2's sensor and usually indicates a faulty connection or a failed sensor.
The alert usually points to a damaged or incorrectly connected pool sensor, with clear symptoms and a risk of the system losing regulation.