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Worcester Fault Codes

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Worcester Bosch boilers are undoubtedly the best around. They outshine many other big boiler brands when it comes to their popularity, but why? They’re efficient, reliable, and award-winning – consistently taking first place in the Which? Gas Boiler and Best Buy reports.

As with any boiler though, problems can start to present themselves. Some issues are more common than others when it comes to Worcester boiler problems. So it’s worth getting clued up about how to identify these in advance!

This way, when you notice your boiler acting up, you can think logically to decide whether the issue is detrimental to your boiler’s health - or easy to solve.

How can you identify Worcester faults?

All Worcester Bosch boilers installed in the last decade will have a control panel on the front clearly displaying Worcester boiler fault codes. Most codes will appear as a Worcester boiler EA fault, though occasionally these may differ. You can easily find and reference these to pinpoint the error at hand by looking in your boiler manual or checking online.

Some boiler issues can develop and cause serious damage further down the line. Here are some quick regular checks you can do to identify any potential Worcester boilers problems:

  • Is your thermostat timer and temperature gauge set correctly?
  • Is your boiler pressure at a normal level?
  • Are all the appliances around your home receiving a gas supply?
  • Is there a blue light showing on the front of your boiler? If so, there will be an error to investigate.
  • Are there any Worcester boiler error codes being displayed? The code will allow you to identify the issue easily.

Common Worcester  fault codes

  • EA338 or A281 – A leak somewhere, either within your boiler or around the system.
  • A41 – Boiler making loud noises – likely due to a faulty pump or heat exchanger.
  • EA227 – Boiler has locked out. This will be to prevent any further damage occurring and to remove potential danger.
  • E5218, E5332, E9219, E9224, D1286 – Boiler has overheated.
  • EA225 or D5 – Condensate pipe is blocked.

Noticed a Worcester fault?

Worcester boiler faults tend to occur very rarely due to the quality and reputability of their components. As your boiler starts to get older and issues do start to show, you can use Worcester boiler error codes to diagnose the issue. It is important to keep in mind that the process of actually fixing any issues should be left to an engineer to be on the safe side.

Let’s investigate some of the more notable Worcester boiler problems, so if they arise, there’s no need to panic.

Boiler problem 1: no hot water

A lot of Worcester boiler faults are noticeable initially through having trouble heating your home. Worcester boiler problems with heating are often evident through the temperature of the water coming through your taps or within your radiators.

Battling through a chilly home due to your radiators not receiving any hot water? Only have lukewarm/cold water coming through your taps? These are clear signs of a fault or blockage somewhere within your heating system.

There are a few other things that may have gone wrong to mean you have to endure a cold shower.

Do you have a faulty diverter valve?

Diverter valves are not large components of your boiler, but don’t let their size fool you. This boiler component is responsible for controlling both the hot water flowing to your taps/showers and the hot water for your central heating system.

If it’s not faulty, a diverter valve should prioritise providing hot water to your taps and showers - over your central heating. So, as you turn a hot tap on, the valve should be tightly closed, preventing hot water from flowing to your heating pipes. This way, you can have optimum hot water for your taps and showers - rather than having to split the hot water with your radiators.

The problems can arise as your boiler gets older and the diverter valve starts to stick when opening and closing.

Don’t worry, Worcester Greenstar diverter valve problems are not something to worry about if you have a relatively new boiler. It’s when your boiler starts to age that it will be more prone to this occurring.

How to identify a faulty diverter valve

  • You have no heating but do have hot water. Or you have no hot water but do have heating. Either of these is a strong indicator that your diverter valve is stuck either open or closed.
  • Your tap water is lukewarm. This implies your valve is sticking as it closes so your taps/showers can’t receive the full heating power of your boiler.
  • Your central heating must be turned on for you to have hot water through the taps.

How to solve worcester greenstar diverter valve problems 

Sadly, having a faulty diverter valve is not good news. The valves are not always the cheapest item to replace. This will of course have to be carried out by a Gas Safety Registered Engineer. If you add up the cost of a valve, the tools needed to do the job, and the hourly rate of a skilled engineer will be expensive.

Therefore, if you find your valve is sticking frequently and causing trouble - then this is a great time to begin looking for a replacement boiler.

Replacing your boiler doesn’t have to break the bank. It can be a surprisingly positive experience. Opting for a new Worcester Bosch boiler is likely to be cheaper than replacing such a small but essential component, especially if your boiler is becoming worse for wear anyway.

Don’t believe us? Take a few minutes to answer our quick and simple questions on the BOXT site, where we will find your perfect boiler match. You can even have it installed as soon as the next day!

Boiler problem 2: no heating

Are you finding your boiler isn’t turning on or functioning whatsoever? This is referred to as your boiler locking out. There are several potential causes of this. Your boiler may have gained or lost too much pressure or even lost power completely. All Worcester boilers are fitted with safeguards, which essentially prevent any risk or danger, by stopping your boiler in its tracks when a certain issue occurs.

After a boiler lock out, the Worcester boiler error code 227 will be displayed, so you can easily identify this issue and get it seen to as soon as possible.

Is your condensate pipe blocked?

All modern combi boilers by law must have a condensate pipe which vents any harmful flue gases from your home. Due to these pipes being outside, they can become blocked by debris or freeze during the winter months. This can cause issues like your boiler overheating and eventually locking out.

When this happens, simply use warm water to defrost the pipe if necessary or remove any blockages to allow flue gas to escape freely. Most issues are identifiable by a Worcester boiler EA fault – in this case, look out for the code EA225.

Boiler problem 3: pressure issues

When it comes to the issue of pressure within your boiler, the problem can be simple and easy to solve, or a lot more serious.

If you’ve noticed your boiler pressure rising or dropping gradually over time, this isn’t something to worry about. To boost your boiler pressure back to normal levels, you can follow the steps for re-pressurising or call out an engineer to help. For lowering pressure, you may need to have a go at bleeding your radiators to release any trapped air from your system.

More sudden and dramatic drops in boiler pressure can indicate a more pressing matter to deal with.

Is there a leak in your system?

Leaks can occur at any time within any area of your heating system, this can make them more difficult to spot! Look around your boiler, pipes, radiators, valves, and even your water pumps for any damp or swollen patches. Worcester Bosch fault codes to look out for to signal whether you have a leak are EA338 or A281. 

Unfortunately, if the leak is within your boiler, there is a likelihood that there is a part that needs replacing. Whether this be certain release valves or your entire pipework. An engineer should examine this issue.

Are you having central heating pump problems?

Your central heating pump may be the culprit when it comes to locating a leak and fixing a sudden drop in boiler pressure. The valve seal on a pump will wear down over time naturally, especially if too much pressure is placed on it or there is a sudden increase in water flow.

As well as causing your boiler’s pressure to drop, your central heating pump problems can have the opposite effect. If a pump gets too hot due to an error, it will seize up, affecting the overall temperature of your boiler and wreaking havoc.

Whilst replacing your central heating pump is an option, if your boiler has reached a certain age, it won’t be worthwhile. With BOXT, you can replace your boiler at a highly competitive price, knowing you are investing in a boiler that will last many years – rather than spending money on your old boiler that is on the way out.

Whilst replacing your central heating pump is an option - after it’s reach a certain age it won’t be worthwhile. With BOXT, you can replace your boiler at a highly competitive price. Reliable, smooth, and consistent. BOXT boilers will last longer - giving you confidence in your home. 

Boiler problem 4: hearing loud noises

Occasionally with a Worcester boiler, or any boiler for that matter, faults may be noticeable due to loud or unusual noises being produced. If you do hear some strange noises, look for Worcester boiler error codes to identify why this may be happening. Code A41 is a common code that presents itself when a boiler is making loud noises.

Again, this might be a result of a faulty water pump or an airlock in the pump. This will be preventing water from flowing through smoothly. Or, there could be an issue with your boiler heat exchanger, in this case your boiler is ‘kettling’. This noise occurs due to a build up of limescale or sludge on the heat exchanger, which restricts the water flow, causing the kettle-like noise. You don’t need to worry when this happens, as your boiler will use its built-in safeguards to lockout and remove any further risk.

You can attempt to power flush your boiler and fix this error, however it is usually a sign of needing a replacement heat exchanger. Consistent kettling problems will usually only occur in boilers that have been installed for a significant number of years. Consider replacing your boiler for a new Worcester Bosch model which comes with a 10 year warranty as standard. Enjoy peace of mind for the next decade, and save more money in the long run - rather than replacing old parts of an inefficient boiler.

Boiler problem 5: no power to boiler

In an instance of your boiler power cutting off: check your sockets in case they have tripped, your Printed Circuit Board (PCB), or your Residual Current Device (RCD) for any faults.

If you think there is a fault with any of these components, it’s essential that you call out an engineer to look closer. Again, it’s likely that power failures are a result of a more serious issue around your boiler that would be best solved by replacing your unit – and can be affordable. 

Interested in replacing your boiler and avoiding recurrent worcester boiler problems?

If your Worcester boiler is one of the older models (over eight years old) it may well be time to opt for a new boiler. At BOXT, our specialists can advise you on whether you need a replacement and the right type of boiler for your home. If you’re seeking specific advice, speak to us via web chat or visit our site for more information.

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