There is nothing worse than trying to use your boiler only to find an error code flashing on the control panel. If you are in this position and can see a Worcester error code A21, then you are in the right place! Read our guide to find out what this code is and how you can resolve it so that you can get back to enjoying heat and hot water

What Does the Worcester Error Code A21 Mean?

If you get the A21 error code, then this is telling you that there is no RF signal between your boiler and your thermostat, meaning that they are unable to communicate and provide heat to your property. The Worcester error code A21 is one of the most common problems and can often be easily fixed without the need for an engineer.

What Causes the Worcester Error Code A21?

When your RF signal fails, your thermostat and boiler are unable to work together to heat your home. If the RF signal is poor, then this can then cause the A21 error code that you see on your control panel.

Can I Fix the Worcester Error Code A21 Myself?

Many of us are keen to see if we can resolve any error code before calling an engineer out. However, it is important to note that many codes signal something dangerous may be occurring, and so you should call an engineer out without delay.

The good news with the A21 error code is that it can often be resolved quickly by relocating the thermostat to be closer to the boiler. Try a number of locations to enable you to get the best signal strength so that it does not fail again. If this does not work, then you may want to call an engineer out to help.

When Should I Call an Engineer for a Worcester Error Code A21

If you find that your thermostat regularly fails to connect to your boiler or that you cannot get it to connect even when you move it closer to the boiler, then you may need to call an engineer out. 

An engineer will troubleshoot all known issues with the boiler and thermostat to get to the heart of the issue. They will also be able to explain all the steps they took and the outcome of their efforts. If you are going to call an engineer out for this issue, then it may be a good idea to combine it with an annual service so that you can be sure that all the other parts of your boiler are working effectively too.

Why Should I Get My Boiler Serviced Annually?

Arranging an annual service is a logical step to take as it gives you the opportunity to find out how well your boiler is working, whether there are any potential issues that need to be resolved and to ensure that everything is clean and clog-free.

A domestic boiler will need to be replaced every 10-15 years if it has been well looked after. Failing to care for your boiler can reduce the replacement time significantly and will cost you a lot more money in the long run.

Boilers that are serviced annual will work for longer and provide you with more consistent heat. The good news is that a service takes less than an hour to complete and provides you with the peace of mind that you need to move forwards.

Rowlen Are Here to Help

If you need help to get your boiler to work, then Rowlen is here for you. We work across London, Surrey and the surrounding areas and provide an excellent and customer-focused service so that you are never left without heat or hot water for long. We provide emergency callouts day or night and also offer annual service plans, boiler replacements and much more. Connect with us today and arrange an appointment to get your A21 error resolved quickly and efficiently – we can’t wait to help you.