Electric boilers, while generally quieter than their gas-powered counterparts, can still produce various noises during their operation. These noises can be caused by a range of issues, from electrical problems to mechanical malfunctions. Understanding the common causes of these noises can help homeowners and technicians quickly identify and address the underlying issues.
Humming or Vibrating Noises
One of the most common noises associated with electric boilers is a humming or vibrating sound. This can be caused by several factors:
- Malfunctioning Pump: The boiler’s circulation pump is responsible for moving the heated water through the system. If the pump is not functioning correctly, it can create a humming or vibrating noise.
- Pump Bearing Wear: Over time, the bearings in the pump can wear down, leading to increased friction and vibration.
- Pump Impeller Imbalance: If the impeller inside the pump is not properly balanced, it can cause the pump to vibrate and create a humming noise.
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Pump Cavitation: When the pump is not receiving enough water, it can cause cavitation, which can result in a humming or vibrating sound.
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High Pressure in the System: If the pressure in the boiler system is too high, it can cause the boiler casing or other components to vibrate, leading to a humming noise.
- Expansion Tank Issues: A malfunctioning or improperly sized expansion tank can cause pressure fluctuations, leading to vibrations.
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Blocked Valves or Pipes: Blockages in the system can restrict water flow, causing pressure buildup and vibrations.
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Blockage in the Flue or Air Intake: If the boiler’s flue or air intake is blocked, it can create a humming or vibrating noise as the fan struggles to draw in the necessary air for combustion.
- Debris Buildup: Over time, debris can accumulate in the flue or air intake, restricting airflow.
- Incorrect Flue Installation: Improper installation of the flue can lead to airflow issues and vibrations.
Buzzing or Whining Noises
Another common noise associated with electric boilers is a buzzing or whining sound. This can be caused by the following issues:
- Worn Pump Bearings: As the pump bearings wear down, they can create a high-pitched whining or buzzing noise.
- Bearing Lubrication: Inadequate lubrication of the pump bearings can accelerate wear and lead to this noise.
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Bearing Misalignment: If the pump bearings are not properly aligned, it can cause them to vibrate and produce a buzzing sound.
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Vibrating Fan Bearings: The boiler’s fan, responsible for circulating air, can also be a source of buzzing or whining noises if the bearings are worn or misaligned.
- Fan Bearing Wear: Over time, the fan bearings can wear down, leading to increased vibration and noise.
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Fan Imbalance: If the fan is not properly balanced, it can create a buzzing or whining sound.
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Defective Burner: In some cases, a buzzing or whining noise can be caused by a problem with the boiler’s burner, such as a malfunctioning ignition system or a worn-out burner component.
- Ignition System Issues: Problems with the ignition coil, spark plug, or other ignition components can lead to buzzing or whining noises.
- Burner Wear: Over time, the burner components can wear down, causing changes in the combustion process and resulting in buzzing or whining sounds.
Cooling Down Noise
During the cooling down process, especially in electric boilers like the Elnur Mattira Mas 15, the water circulation can create audible sounds as the system cools down.
– Water Circulation: As the heated water circulates through the system, it can create a sloshing or gurgling noise as it cools and contracts.
– Thermal Expansion: The expansion and contraction of the boiler components during the cooling process can also contribute to audible noises.
Other Noises
In addition to the common humming, vibrating, buzzing, and whining noises, electric boilers can also produce a variety of other sounds, including:
| Noise | Possible Cause |
|---|---|
| Sloshing of water (condensate) | Accumulation of condensate in the system |
| High-pitched squealing (pump) | Worn or damaged pump bearings |
| Chugging | Buildup of sludge or debris in the system |
| Boiling | Restriction or blockage in the system |
| Rattling | Loose boiler casing or components |
| Knocking | Buildup of scale in the system |
| Chattering | Malfunctioning gas valve |
| Hooting | Issues with the boiler’s fan or flue |
| Crackling | Short circuit in the electrical components |
| Ticking | Problems with the ignition system |
| Creaking | Worn bearings in the boiler’s components |
| Clanking | Issues with the boiler’s fan |
To troubleshoot these noises, it is essential to identify the source of the sound and check for any fault codes or error messages displayed on the boiler’s control panel. In many cases, professional assistance from a qualified heating engineer may be necessary to diagnose and address the underlying issue.
References
- Viessmann. (n.d.). Why is my boiler making noises? Retrieved from https://www.viessmann.co.uk/en/heating-advice/boilers/why-is-my-boiler-making-noises.html
- Parkstone Yorkshire. (n.d.). Boiler Noise: What’s That Sound? Retrieved from https://www.parkstone-yorkshire.co.uk/boiler-noise/
- Yost & Campbell. (2021, March 31). 4 Sounds Your Boiler Shouldn’t Make. Retrieved from https://www.yostandcampbell.com/blog/4-sounds-boiler-shouldnt-make/
- HVAC-Talk. (n.d.). Hydronic Radiant system, Electric boiler noise and bouncy pressure. Retrieved from https://hvac-talk.com/vbb/threads/1653121-Hydronic-Radiant-system-Electric-boiler-noise-and-bouncy-pressure
- DIYnot. (n.d.). Electric boiler cooling noise. Retrieved from https://www.diynot.com/diy/threads/electric-boiler-cooling-noise.607566/