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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 is usually caused by low pressure, but the source may be a leak or a worn component.
The boiler locks out due to an anomaly in the electrical supply. These are the actual causes and what to check safely.
The boiler protects itself after a voltage drop and stops working until the power supply becomes stable again.
The boiler detects an internal fault in the control board. These are the most likely causes and what to check without opening the unit.
A Cointra boiler may lock out due to a ventilation fault or an electrical signal failure. Here’s how to interpret it and address it safely.
The fault indicates a problem with the flue gas sensor or its wiring and requires a careful technical inspection.
The warning indicates a fault in the hot water probe and may cut off the service or make it unstable.
The F11 warning points to the hot water sensor or its wiring and may prevent normal operation.
The warning points to the flow sensor and is usually caused by the probe or the wiring. Here’s how to interpret it and fix it.
The boiler protects itself against overheating: causes, signs and useful checks to carry out before calling a technician.
The boiler locks out for safety when it detects abnormal heat at the flue outlet. These are the real causes and their scope.
The boiler goes into lockout after several consecutive restarts. This warning points to a safety limit, not to a specific fault.