Common Worcester Bosch Boiler Problems & Repair Advice

Common Worcester Bosch Boiler Problems & Repair Advice

Worcester Bosh Repair Advice

Hot water and heating is something we should be able to rely on our boilers for every single day. From time to time, our reliable boilers can play up, sometimes bringing chaos and panic upon the household. You’ll be glad to know that some common boiler problems are easily treatable, and may not even need an engineer.

If you have a Worcester Bosch boiler, this complete guide to the most common problems they experience will help you through any period of boiler trouble. Should you need an engineer, and always consult one if in doubt, you can get a free boiler repair quote with our service.

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Who are Worcester Bosch?

Worcester Bosch are one of the most well known and popular brands on the market and set very high standards with each and every boiler which has seen them scoop up seven Which? Best Buy awards in a row. You can get to know Worcester Bosch and their range of products even better with Boiler Guide.

Top 5 Worcester Bosch Boiler Problems

  1. Low boiler pressure

    Having low boiler pressure can lead to the central heating system not functioning as well as it should do. Checking the boiler pressure couldn’t be easier, simply take a look at the pressure gauge and if it shows anything below 1 then you may have an issue. Use our guide to low boiler pressure to find out even more.

  2. No hot water

    There are several possible causes when you’re experiencing no hot water, this can be broken diaphragms and airlocks, issues with the thermostat, low water levels or failure of motorised valves. Always be sure to check if an issue with boiler pressure or your thermostat are causing the issue.

  3. If you’re unsure, or have identified that your boiler needs a new part, then you’ll need a Gas Safe registered engineer who will diagnose the issue and replace any broken parts.

  4. Boiler is leaking

    Leaking is most commonly caused by a broken internal component but it really depends on where the leak is coming from so will need to be looked at by an engineer.

  5. Boiler keeps making banging noises

    Hearing banging sounds from your boiler is an indication of kettling, which is generally caused by limescale buildup, a faulty thermostat or inadequate water pressure. This can cause ongoing problems with the central heating system.

  6. Boiler keeps locking out

    If your boiler has locked out then there’s likely to be a fault with the system, so it’s locked out to prevent further damage. If you’re seeing an error code, you can see what it means by using our list of Worcester Bosch error codes.

Which Boiler Issues Need an Engineer?

Use the table below to see the most common boiler problems, find out the potential cause and know if you’ll be able to tackle the fault yourself.

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Problem Possible Cause Do you need an engineer?
No heat or hot water Broken diaphragms and airlocks, failure of motorised valves, issues with the thermostat or low water levels Yes
Leaking and dripping Most common cause is a broken internal component but it will depend where the water is leaking from Yes
Banging, whistling or gurgling noises A common cause is air in the system, alternatively it could be that the water pressure is too low or it’s kettling Yes
Pilot light goes out Could be a broken thermocouple which is stopping the gas supply Yes
Losing pressure There could be a water leak in the system, the pressure relief valve needs replacing or the radiators have been bled recently No, unless there’s a leak
Frozen condensate pipe Your boiler should display a fault code or warning notification Yes
Thermostat issues Thermostat may be turned off or not set to the correct settings (time etc.) Consider replacing
Kettling Limescale or sludge building up on the boiler’s heat exchanger Yes
Radiators not getting hot Sludge or air build up in the system or an unequal distribution of heat You will need to bleed the radiators which doesn’t require an engineer unless you don’t feel like carrying out the task yourself.
Boiler keeps switching itself off Could be low water pressure, a problem with the thermostat or a lack of water flow due to a closed valve, air in the system or the pump not circulating the water in the system correctly Yes

Error Codes

When there’s an error with your Worcester Bosch boiler, an error code will display in the form of a letter and number. Get familiar with what the error codes mean with our list of Worcester Bosch error codes.

Should You Replace Your Worcester Bosch Boiler Instead?

If your Worcester Bosch boiler has been heating your home for a long period of time then it could be worth considering a new one. With a new boiler, you could be saving up to £305* a year in a detached home. Take a look at the table below to see how much you could be saving depending on your current boiler rating and property.

House Type G (<70%) F (70-74%) E (74-78%) D (78-82%)
Semi-Detached £200 £140 £120 £120
Detached £305 £210 £180 £180
Detached Bungalow £155 £105 £90 £90
Mid terrace house £175 £120 £105 £105
Mid terrace house £95 £65 £55 £55

Who Should You Choose to Replace a Worcester Bosch Boiler?

Making the decision to replace your current boiler means deciding who you’ll be hiring to do the work, a local engineer or a national company.
While branded manufacturers may cost a slightly more than a local engineer, you’ll be covered by big brand protection, which is a great benefit. They could provide extra services, such as ongoing boiler cover.

Likely to offer very competitive rates, local engineers will also deliver a personal service from the same person throughout your communications. When considering engineers, don’t go with the first quote you receive, we recommend getting up to 3.

Boiler Insurance and Ongoing Cover

Once your boiler warranty has expired, it could be well worth considering boiler insurance. You may want to do this through your energy supplier, but there’s absolutely no obligation to do so. When comparing boiler insurance, keep an eye out for ones that offer annual service and safety inspections.

Worcester Bosch Boiler Warranty

The majority of Worcester Bosch boilers come with 2 years of warranty of standard, although with some models this extends a bit further to 5 years. Use our complete guide to Worcester Bosch warranties for more information.

Keeping your warranty valid for its entire length will require you to arrange an annual service of your Worcester Bosch boiler, which involves a Gas Safe engineer testing your boiler to make sure that the unit is running safely and efficiently.

Send us an enquiry today to receive free quotes for a new boiler and find trusted engineers near you with our free service.

*According to the latest figures from the Energy Saving Trust

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