Boiler Broken Down? What to Check Before Calling an Engineer

A boiler breakdown can be frustrating, especially when you suddenly have no heating or hot water. Before calling an engineer, there are a few simple checks you can make safely. These may help you understand what is happening and give your heating engineer useful information when you get in touch.

Why Have I Got No Heating or Hot Water?

If your boiler is not providing heating or hot water, first check whether the boiler has power. Make sure the display is on and check that your thermostat is calling for heat.

You can also check whether the boiler is showing a fault code or warning light. If there is a code on the display, make a note of it as this can help the engineer identify the problem more quickly.

If the boiler has stopped working completely, avoid removing the boiler cover or attempting any internal repairs.

Is There a Fault Code Showing?

Modern boilers often display a fault code when something is not working correctly. The code can indicate an issue that needs professional attention.

Take a note or photo of the code before contacting FlameFlow. Providing this information when you call can help us understand the problem before the engineer arrives.

What Should My Boiler Pressure Be?

Many sealed heating systems have a pressure gauge or digital pressure display. When the system is cold, the pressure is commonly around 1–1.5 bar, although the correct range can vary depending on your boiler and heating system.

If the pressure is significantly below or above the recommended range shown in your boiler manual, it may indicate an issue that needs checking.

Why Does My Boiler Keep Losing Pressure?

A boiler that repeatedly loses pressure may have an underlying problem. This could be related to the heating system, a leak, a component or another fault.

If you find yourself regularly topping up the pressure, don't simply keep resetting or repressurising the system. Arrange a professional inspection to identify the cause.

For ongoing maintenance and checks, see our Boiler Servicing service.

Is It Safe to Keep Resetting My Boiler?

A single reset may sometimes be enough to clear a temporary fault, depending on the boiler manufacturer's instructions.

However, repeatedly resetting a boiler is not a solution if the fault keeps returning. If the boiler continues to lock out or display a fault code, it's best to stop resetting it and arrange a professional inspection.

Never attempt to bypass safety controls or carry out repairs yourself.

What Information Should I Give FlameFlow When I Call?

The more information you can provide, the easier it is for us to understand the problem.

If possible, have the following details ready:

• Your postcode

• Boiler make and model

• Any fault code showing on the display

• Whether you have heating, hot water, or neither

• Any unusual noises or smells

• Whether the boiler has been losing pressure

• When the problem first started

This information can help us prepare for the appointment and ensure the engineer knows what to expect.

Should I Send a Photo of the Boiler or Fault Code by WhatsApp?

Yes. If convenient, you can send a clear photo of the boiler display, fault code or pressure gauge by WhatsApp.

A photo can give our team useful information before the visit. If possible, include the full boiler display and make sure the fault code or pressure reading is clearly visible.

What Will the Engineer Check When They Arrive?

When our engineer arrives, they will assess the boiler and heating system to identify the cause of the problem.

Depending on the issue, they may check the boiler controls, pressure, electrical supply, system components and other relevant parts. They will explain their findings and advise you on the appropriate next steps.

For more information about professional boiler fault finding and repairs, visit our Boiler Repairs page.

When Should I Stop Using the Boiler?

If you smell gas, suspect a gas leak, see signs of carbon monoxide, or notice anything that appears unsafe, stop using the appliance and seek professional help immediately.

Do not attempt to repair the boiler yourself or remove its casing. If you suspect a gas leak, follow the appropriate emergency gas safety guidance for your area.

For less urgent problems, such as recurring fault codes, pressure loss, unusual noises or repeated shutdowns, arrange an inspection rather than continuing to reset the boiler.

Boiler Not Working? We're Here to Help

A boiler breakdown doesn't always mean you need a replacement. Getting the problem checked properly can help identify the cause and determine the right solution.

Boiler not working? Call or WhatsApp FlameFlow with your postcode, boiler make and any fault code showing.

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