Boiler o-rings and seals might be some of the smallest components in your heating system, but they perform some of the most critical functions. These flexible, heat-resistant parts are essential for maintaining watertight and gas-tight seals across a range of connections inside your boiler. When they fail, the results can range from minor drips to […]
Actuator motors might not be the most talked-about boiler component, but they’re a crucial part of any modern heating system. Found within motorised valves, these small but powerful devices control the flow of water within your central heating and hot water circuits. Knowing how actuator motors function and what happens when they fail can help […]
There are many components in a modern combi boiler; the flow switch is one of the unsung heroes. Found in combi and system boilers, the flow switch helps regulate hot water delivery and keeps your system safe by ensuring correct operation before ignition. When it fails, the results are immediate: no hot water, error codes, […]
Condensate traps might not be the most glamorous part of your boiler, but they’re absolutely vital for safe, efficient operation. The condensate trap handles acidic wastewater created during combustion in virtually all modern condensing boilers. When it’s working well, you won’t even know it’s there. You could face leaks, lockouts, and expensive repairs when it […]
In modern gas boilers, electrodes are small components with big responsibilities. Often hidden inside the combustion chamber, electrodes are crucial for igniting the boiler and monitoring the flame once it’s lit. Whether you’re a Gas Safe engineer, a landlord keeping properties in top condition, or a savvy homeowner, understanding the function, failure signs, and replacement […]
What a Boiler Pump Means for Your Heating System A central heating pump is designed to push hot water through your heating circuit. It keeps water moving from the boiler to the radiators and sometimes back through heat exchangers for domestic hot water. The system can’t circulate heat without a functioning pump, resulting in cold […]
What makes a properly functioning boiler pressure valve so essential? It delivers three fundamental protections. First, it prevents system ruptures by releasing excess pressure before dangerous levels develop. Second, it protects internal components from pressure-related damage, extending your boiler’s operational life. Third, it safeguards your home and family from potential hazards associated with boiler failures. […]
Boiler cartridges may be one of the more understated components in a heating system, but they are crucial for maintaining control over water flow, temperature regulation, and operational efficiency. Often found within diverter valves or flow groups, cartridges ensure that your heating system delivers hot water to the right place at the right time. If […]
How Expansion Vessels Work An expansion vessel absorbs the natural increase in water volume as it heats up. It’s essentially a pressure buffer; a sealed chamber split into two parts by a flexible diaphragm. One side holds water from the heating system, the other holds air or nitrogen. When the water heats and expands, it […]
Heat exchangers are the unsung heroes of your boiler. Without them, you wouldn’t have hot water or central heating. These components do the heavy lifting, transferring heat from the gas burner to the water that flows through your taps and radiators. But like all hardworking parts, they wear down over time. Understanding the importance of […]
