A noisy diverter valve on a boiler is a common issue that can cause unwanted sounds and disturbances in a heating system.

To understand what a noisy diverter valve is, let’s first explain what a diverter valve is and its function in a boiler system.

A diverter valve is a crucial component found in some types of boilers, particularly in combination or “combi” boilers. Combi boilers are designed to provide both central heating and hot water on demand, making them popular for residential homes in Scotland. The diverter valve serves as a mechanism that directs the flow of heated water between the central heating system and the domestic hot water supply.

When you turn on your hot water tap, the diverter valve moves to divert the flow of hot water from the boiler’s primary heat exchanger (where it is used for central heating) to the plate heat exchanger, which heats the water for domestic use. Once the hot water demand is met, the valve returns to its original position, allowing the boiler to resume providing heat to the radiators for central heating.

Now, a noisy diverter valve occurs when this component becomes faulty or damaged. The most common reason for the noise is when the valve fails to move smoothly or completely into its correct position. This can result in a range of sounds, such as clicking, banging, rattling, or vibrating noises, whenever the boiler is running or when you are using hot water.

Several factors can lead to a noisy diverter valve

Wear and tear: Over time, the moving parts of the diverter valve can wear out, causing it to become less efficient in its operation.

Accumulation of debris: Dirt, limescale, or other debris can accumulate around the valve, hindering its movement.

Valve motor issues: If the diverter valve is motor-operated, problems with the motor or the electronic components can cause irregular movements.

Incorrect water pressure: If the water pressure in the heating system is too low or too high, it can affect the performance of the diverter valve.

A noisy diverter valve isn’t just annoying; it can lead to other problems as well. The improper functioning of the diverter valve can reduce the efficiency of the boiler and increase energy consumption. Additionally, the noise may indicate potential mechanical failures that, if left unaddressed, could lead to a complete breakdown of the boiler.

If you encounter a noisy diverter valve or any strange noises coming from your boiler, it’s essential to have it inspected and repaired. Call the Wright Gas team today. We can diagnose the issue accurately and either repair or replace the diverter valve to restore your boiler to its optimal performance and quiet operation. Regular maintenance and servicing can also prevent such issues and prolong the lifespan of your heating system.