One of the most common problems in domestic boilers is the flame block error. This occurs when, during the ignition phase, the detection glow plug does not detect an adequate flame value. Consequently, not sensing the burner on, the boiler locks after a few seconds.
Practical Causes and Solutions
First of all, it is crucial to check that gas is correctly reaching the burners. This can be a primary indicator of the gas flow status in your home. Also, ensure that the gas valve, usually yellow, is fully open.
Another practical tip is to reverse the plug's polarity. Some boilers indeed use the neutral wire for flame detection, and reversing the plug can solve the problem.
The Crucial Role of the Ignition Glow Plug (electrode)
Another aspect to consider is the ignition glow plug. This component is essential for initiating combustion: if the glow plug is damaged or not functioning correctly, it might not ignite the burner. This can be a common cause of the flame block error, and its verification should be part of the control routine if problems with the boiler are encountered.
Another practical tip is to reverse the plug's polarity. Some boilers indeed use the neutral wire for flame detection, and reversing the plug can solve the problem.
Issues with the Detection Glow Plug (electrode)
The detection glow plug plays a crucial role in the boiler's operating system. This component is responsible for flame detection and transmitting this information to the boiler's main board. A malfunction or breakage of the detection glow plug can lead to non-detection of the flame, a common error that can cause the heating system to lock.
Particularly in condensing boilers, the detection glow plug faces additional challenges. These boilers reach very high temperatures, and without adequate maintenance, the glow plug can suffer damage. A frequent issue is the glow plug becoming desoldered from its connecting wire due to prolonged exposure to these high temperatures. This makes regular checking of the detection glow plug essential, especially in condensing boilers, to ensure the correct operation and safety of the heating system.
The Importance of Regulating the Gas Valve for Flame Detection
Precise regulation of the gas valve is crucial to ensure correct flame detection in the boiler. The detection electrode, a key component in this process, must be correctly positioned to intercept the flame sample in its blue part. This is because the flame sample has a zone, characterized by a transparent coloration, where the premixed gas is not in combustion, and in this area, flame detection cannot occur.
An inadequate adjustment of the gas valve can lead to incorrect positioning of the flame sample relative to the detection electrode, thus preventing proper flame detection and potentially causing the boiler to lock. This makes it crucial to ensure that the gas valve is correctly regulated, not only for the safety and efficiency of the heating system but also to prevent malfunctions due to inadequate flame detection.
When to Contact a Professional
If, despite these attempts, the boiler continues to show the flame block error, the intervention of a specialized technician may be necessary. Remember that regular maintenance of your boiler is essential to ensure its efficiency and safety.