Some of the most common faults include low or fluctuating pressure, leaks around the boiler, strange noises such as banging or whistling, pilot light or ignition issues, and error codes on the control panel. Another frequent issue is when radiators fail to heat up properly even though the boiler appears to be working. These problems can stem from worn-out parts, trapped air in the system, or internal corrosion. An experienced Gas Safe engineer will quickly identify the cause and recommend the best fix. 

 

It’s not recommended. While you can carry out very basic checks — such as topping up the boiler pressure, bleeding radiators, or resetting the unit — any internal repairs should only be handled by a Gas Safe registered engineer. Boilers involve gas, electricity, and water systems, which makes DIY repairs dangerous. Attempting to fix a fault yourself could not only be unsafe but also void your boiler’s warranty. 

 

The cost of a repair depends on the fault, the make and model of your boiler, and whether replacement parts are required. Simple issues like pressure problems may be inexpensive to fix, while more complex faults such as a broken heat exchanger can be costlier. On average, UK homeowners can expect boiler repairs to range between £100 and £500, though we’ll always provide a clear quote before starting any work so you know exactly what to expect. 

 

We understand how disruptive it is to be without heating or hot water, especially in winter. That’s why we prioritise emergency call-outs and aim to provide same-day repairs wherever possible. If your boiler is leaking, not igniting, or has completely stopped working, call us straight away and we’ll do our best to get an engineer out to you quickly. 

 

Sometimes repairing an old or inefficient boiler doesn’t make financial sense. As a rule of thumb, if your boiler is over 15 years old, breaks down regularly, or the repair cost is more than half the price of a new unit, it may be time to replace it. Modern boilers are much more energy efficient, which means lower running costs in the long run. During a repair visit, our engineers will always give you honest advice about whether it’s better to repair or replace. 

 

Yes. All repairs carried out by GasPro Boilers are backed by a workmanship guarantee, and we use genuine replacement parts wherever possible. This gives you reassurance that your boiler has been repaired to a professional standard and will continue to run safely after we leave. 

 

Most modern boilers display an error code when something isn’t working correctly. These codes are designed to help engineers diagnose the problem quickly. While you can look up the meaning in your boiler’s manual, it’s best to call a professional engineer. Providing the error code when you book a repair helps us prepare with the right tools and parts before we arrive. 

 

Yes, our engineers have experience with all major brands and types of boilers, including combi, system, and regular boilers. We also carry common spare parts in our vans, so many repairs can be completed in a single visit.