The clicking sound you hear when turning on your radiator is often caused by thermal expansion of the metal.
Thermal Expansion and Clicking
When you turn on your radiator, the water inside heats up. This causes the metal of the radiator to expand, putting stress on the internal components. As the metal cools down, it contracts, leading to a clicking sound.
Other Possible Causes
While thermal expansion is the most common cause, other factors can also contribute to clicking sounds:
- Air in the system: Trapped air in the radiator system can expand and contract with temperature changes, creating clicking noises.
- Loose or worn parts: If parts inside the radiator, like valves or fittings, are loose or worn, they can rattle or click as the system heats up.
- Pressure fluctuations: Sudden changes in water pressure within the system can also cause clicking.
Addressing the Clicking
If the clicking is infrequent and doesn't seem to affect the radiator's performance, it may not be a cause for concern. However, if the clicking is persistent or accompanied by other issues, it's best to consult a qualified heating engineer. They can inspect your system and determine the root cause of the problem.
