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The fault points to an abnormal return reading and can leave the boiler locked until the fault is resolved.
The code indicates excessive water return and is usually related to the probe or internal wiring.
The boiler detects an anomalous difference between supply and return. Causes, signs, and what to check logically.
The boiler detects an abnormal difference between supply and return. We tell you what causes it and what to check.
The boiler is protected against overheating: causes, real clues, and when it is advisable to intervene with a technician.
The L14 fault in a De Dietrich boiler points to ignition: common causes, signs, and when to intervene.
The detection of a parasitic flame triggers a safety shutdown: cause, risk, and technical response.
The L17 lockout usually indicates a fault in gas management or in the electronic board, with well-defined causes and scope.
Deadlines, parts, invoice, and claims: this is how legal coverage works when a device fails again after going through the service center.
The warning usually reveals a lack of water or low pressure in the circuit; this is how it is interpreted and corrected safely.
Fault L251 points to the water pressure gauge or sensor. Here’s how to identify it and what to check.
The L34 warning indicates a fan or flue gas evacuation fault and requires the installation to be checked carefully.