At National Boiler Spares, whether you’re replacing a faulty switch or upgrading your system, our range of high-quality flow switches ensures safety and reliability.
Boiler water flow switches are vital components in any heating system, ensuring safe and efficient operation by detecting the flow of water and preventing the boiler from firing without proper circulation. These switches work alongside other system parts to avoid overheating, protect the boiler, and maintain steady performance.
Worn or malfunctioning flow switches can lead to serious issues in your heating system. Common signs that a switch may need replacement include:Â
- Boiler not firing upÂ
- Frequent shutdowns or lockoutsÂ
- Inconsistent water temperatureÂ
- Error codes related to flow issues
Replacing faulty flow switches promptly is key to ensuring the safety, efficiency, and longevity of your boiler system.Â
Buy flow switches onlineÂ
National Boiler Spares stock a wide range of boiler flow switches for many brands and manufacturers including Baxi, Worcester, Vaillant, Ideal, Glowworm and more.
Shop our range now including the Baxi main potterton magnetic flow switch cartridge, Ideal magnetic flow switch cartridge, and many more. Try using our search bar above to find your specific boiler flow switch by parts or GC number with ease.Â
Why choose National Boiler Spares?Â
Here at National Boiler Spares, we are a trusted source of high-quality boiler spare parts and heating components to customers throughout the UK and beyond. Our comprehensive range of new brand genuine parts covers the latest and older model boilers, all available at the best possible prices online or over our trade counter. We work closely with our suppliers to ensure that we always have the latest and most innovative products available, and we are constantly expanding our boiler spares and parts range to meet the evolving needs of the industry.
Boiler flow switch – FAQs:Â
What is a water flow switch, and how does it work?Â
A water flow switch is a safety device that ensures water is circulating before the boiler ignites. It detects water flow and allows the boiler to fire only when the flow is sufficient. If no flow is detected, the switch prevents the boiler from turning on, protecting it from overheating or damage.Â
How do I know if my boiler flow switch is faulty?Â
You can identify faulty flow switches through several signs:Â
- Inconsistent water temperatureÂ
- Flow related error codes on the boiler control panelÂ
- No water flow detection, even when the pump is running properly
How do you test a boiler flow switch?Â
To test a water flow switch, follow these steps:Â
- Turn off the power to the boiler to ensure safety.Â
- Locate the flow switch: It’s usually near the water inlet or on the circulation line.Â
- Check for continuity using a multimeter. Disconnect the switch and place the multimeter leads on the terminals. If the switch is working, there should be continuity when water is flowing and none when there’s no flow.Â
- Manually inspect the switch: Ensure it moves freely without blockages.Â
- Re-test with water flow: Turn the boiler on and monitor if the switch activates with water flow.
If the flow switch fails any of these tests, it may need cleaning or replacement.Â
How long do flow switches typically last?Â
Boiler flow switches typically last 5 to 10 years, depending on usage, water quality, and regular maintenance. Proper care can help extend their lifespan, but they may wear out over time due to mechanical or electrical issues.Â
