The milder spring weather is finally here. The days are longer, the thermostat is being turned down, and for the first time in months, your boiler is getting a well-earned rest from the relentless work of heating your home. It’s tempting to just switch it off and forget about it until autumn.
But hold on. After a long, hard winter, your boiler has been under immense strain. Switching it off without a second thought can mean storing up problems that will only reveal themselves on the first cold day in October which could be the worst possible time for a breakdown.
At Plumbers 365, we believe a few simple “end-of-season” checks are vital for the health and longevity of your heating system. Here’s what you need to know before you power down.
A common query posed by many, our gas heating experts at Plumbers 365 suggest that while you can turn your heating thermostat right down, it is generally not recommended to turn the boiler’s main power off completely for the entire summer. Modern boilers have built-in protection features. Many have a function that periodically kicks the pump and diverter valve into action for a few seconds to prevent them from seizing up through lack of use as often seen by plumbing specialists at Plumbers 365. Keeping the power on allows the boiler to perform these essential self-maintenance routines.
Plumbing experts at Plumbers 365 sometimes also advise clients to switch to a frost protection setting (usually 12–15°C) rather than turning the boiler off entirely. Most modern boilers have a built-in frost protection mode, our experts suggest to use it.
Plumbers 365 plumbing and heating experts always suggest performing a quick “system status” check where you are advised to:
While these simple checks prevent the majority of spring and early summer breakdowns, should you find a problem, you have the entire summer to contact our local Plumbers 365 team based out of your region and get it fixed.
Plumbers 365 gas heating experts have often seen that a winter of hard work can cause significant wear and tear on internal components like pumps, fans, and valves. A part may be on the very verge of failing but is still just about working. The period of inactivity over summer can be the final straw so the valve can seize, or a seal can perish. The problem was created during winter but only becomes apparent when you next demand performance from the boiler. Many issues only show themselves when the system is used less or when you try to reactivate hot water in late spring as often seen by gas heating experts at Plumbers 365 who suggest that a spring service catches these before they become expensive emergencies.
As often seen by plumbing experts at Plumbers 365, if your hot water is still unreliable in April and your central heating is working fine then your domestic hot water is intermittent or not getting hot enough. According to plumbing experts at Plumbers 365, the most common cause behind the issue is in the diverter valve. This is a valve inside your combi boiler that directs the hot water to either your radiators or your taps. After a winter of being mostly in the “heating” position, these valves can become stiff or clogged with sludge, and they struggle to switch over properly to provide hot water to your taps. Plumbers 365 plumbing experts have often seen that air in the system can also collect in the cylinder, reducing performance. If your boiler works perfectly for heating but hot water is lukewarm or slow, have the diverter valve and cylinder checked before the summer rush.
An absolute necessity considered very important by plumbing experts at Plumbers 365, spring and summer are the absolute best times to get your annual boiler service. The main reason being that a spring service is often more convenient, cheaper, and more thorough than waiting for the autumn rush. While most people service their boiler in Sep-Oct when engineers are fully booked and prices are higher. Going for a spring service is recommended by Plumbers 365 plumbing experts because:
Consider the boiler as your car, just as leaving a car inactive for long periods is not recommended, a boiler doesn’t like being left completely inactive for long periods. Plumbers 365 plumbing experts have often seen that key components can seize up through lack of movement. The pump can seize, sludge can settle in the heat exchanger, and the risk of Legionella increases in the hot water system.
According to plumbing experts at Plumbers 365, the most common victims of inactive periods are:
This is why keeping the power on is so important, as the boiler’s anti-seize function helps to prevent this.
According to plumbing experts at Plumbers 365, the system pressure can drop slowly over time due to minor leaks or natural loss through the pressure relief valve. If the pressure falls too low while the boiler is off, you may not notice until you try to restart the system in autumn and it refuses to fire. A quick glance at the gauge once a month prevents this.
This is the classic sign of sludge build-up. Over the winter, small particles of rust and debris (sludge) that are circulating in your system will have settled at the bottom of your radiators, blocking the flow of water. This means your boiler has to work much harder to heat the room. The end of winter is the perfect time to consider a power flush to clean the system out, restoring efficiency before you need it again.
Plumbers 365 plumbing experts have often observed that blocked condensate pipes, air in the system, and failing pumps all reduce efficiency even if you are only using hot water. Your plumbing and heating systems are interconnected. A simple dripping hot tap, for example, can cause a combi boiler to fire up unnecessarily for short periods. This “cycling” is inefficient, wastes gas, and causes unnecessary wear and tear on the boiler’s components. Fixing small plumbing leaks is a key part of maintaining overall system efficiency.
According to plumbing experts at Plumbers 365, a partially blocked condensate pipe (very common after winter) forces the boiler to work harder. Air in the radiators or a tired pump reduces circulation. These issues often become noticeable in spring when the system is running intermittently rather than constantly.
If your radiators get hot but your taps stay cold (or vice versa), this is a classic boiler fault that requires a Gas Safe registered heating engineer. The problem is almost certainly inside the boiler itself and most likely a faulty diverter valve, as mentioned earlier, or a plate heat exchanger issue. This is not a general plumbing problem; it needs a qualified gas specialist. While a general plumber can help with many issues, a Gas Safe engineer is required for any work that involves the boiler’s gas supply or internal components.
Don’t let your boiler’s hard work go unrewarded. A post-winter check-up is the smartest way to ensure reliability, efficiency, and peace of mind for the year ahead.
Plumbers 365 offers a comprehensive range of heating services to get your system in peak condition.
Book your boiler service during the quiet season. Call Plumbers 365 today.
