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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 alarm points to the main electronics and usually requires a technical diagnosis to prevent repeated lockouts.
The A61 fault usually points to an internal anomaly in the AGC01 board and requires careful technical diagnosis.
The A56 fault usually indicates incomplete or incorrect calibration, with very specific causes related to the sensor or its parameters.
The warning points to the AGC01 control board and usually requires a technical inspection to prevent further damage.
The AGC01 control board can take the boiler out of service due to an internal fault. Here’s how to interpret it and what to check.
The boiler goes into lockout due to an unreliable sensor reading. These are the real causes and the proper inspection.
The boiler enters protection mode due to an incorrectly configured internal parameter. These are the key points for interpreting it correctly.
The warning indicates a problem with the control electronics and prevents the boiler from starting up as a safety measure.
The boiler protects itself against excessive flue gas temperatures. These are the causes, what to check and when to intervene.
The warning locks the boiler for safety and usually points to the flue gas sensor or its wiring.
The return sensor may shut the boiler down as a safety measure. Here are the causes, signs, and useful checks.
The boiler protects itself because of a fault in the flow sensor. Here’s how to tell whether the problem lies with the sensor or the wiring.