Why replacing your boiler helps the efficiency of your home

It's important to ensure your boiler is working as efficiently as possible, and to know the right time to replace it. Modern boilers are a lot more efficient than ones manufactured and installed as recently as ten years ago. Temperature control devices have developed in that time too, meaning you can be far more precise with how you heat each area of your home. Smart thermostats help control your heating via your smart phone ot tablet, so that you never come home to a cold house. And smart radiator valves help you control your rooms individually. 

Common signs your boiler's not working as it should

Leaking or dripping water

Your boiler should never leak water. There are several reasons that could cause this, and it'll depend on where the water is leaking from.

The most common cause is a broken internal component, such as a pump seal or pressure valve. If the leak is coming from the pressure valve, it may be that your boiler pressure is too high. If it’s coming from the pump seal, it may have become worn out and need replacing.

You may also find your boiler is leaking around the pipes or tank – this can be a result of corrosion or, in some cases, where the system hasn't been fitted properly. In any case, we recommend calling out a gas-registered engineer who'll be able to diagnose and fix the issue for you.

Low boiler pressure

Checking the pressure of your boiler couldn’t be simpler, just take a look at the built-in pressure gauge. If you find that the needle is below one, there might be an issue with low boiler pressure and your central heating system won’t function properly.

There a number of reasons why this may be happening:

  • A water leak in the system
  • The pressure relief valve needs replacing
  • Recently bled radiators

Pilot light keeps going out

This could be due to a broken thermocouple, a deposit build-up in the pilot light or a draught blowing the pilot light out. You'll need a professional to fix the issue for you.

Strange banging, whistling or gurgling noises

Air in the system is a common cause, alternatively, it could be that the water pressure is too low. Imminent pump failure, particularly in older systems, could also be responsible for strange banging noises.

Tapping noises could indicate that there's a build up of sludge in your system. This is easy for an engineer to fix by flushing out the system. If the noises are more like a humming, vibrating or banging then a bigger fault may be the cause.

Condensate pipe freezing

In all boilers, there's a condensate pipe which transports acidic water, caused by waste gas, away from the boiler. In most cases, this pipe will run outside into a drain. During extremely cold weather the condensation in this pipe may freeze and cause a blockage which makes the condensate ‘back up’ into the boiler and cause a shutdown. 

If the condensate pipe has frozen then your boiler will probably display a fault code or warning notification. To locate the condensate pipe, it’s the plastic pipe (usually white and roughly 2cm wide) and should lead outside of your property into a drain.

Boiler keeps switching off

This can be caused by low water pressure, problems with the thermostat and air in the system. 

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