Boiler Fault Investigation

What a boiler fault investigation covers

This service focuses on accurate fault-finding, not guesswork, so repairs target the real issue.

• Initial safety checks and a review of the reported symptoms
• Visual inspection for leaks, corrosion, loose connections, and obvious wear
• Checks of boiler pressure, system water condition, and key components where accessible
• Investigation of error codes and control settings (thermostat, programmer, zone controls)
• Targeted testing to confirm likely causes, within the scope of a diagnostic visit
• Clear summary of the fault, what it means, and recommended remedial actions
• Advice on repair options, urgency, and any parts likely to be required

When this service is the right fit

Book a fault investigation if your boiler:

• Keeps losing pressure or needs frequent topping up
• Locks out, resets, or stops working intermittently
• Produces no heating, no hot water, or inconsistent temperatures
• Makes unusual noises (banging, kettling, whistling) or cycles on and off
• Shows recurring fault codes you do not understand
• Has signs of leakage, staining, or corrosion around the appliance or pipework

What to expect during the visit

You’ll be asked about the symptoms, when they happen, and any recent changes to your system. The engineer then works through a structured set of checks and tests to narrow down the cause, and explains what they find as they go. Before leaving, you’ll get a clear outcome: what’s wrong, what needs doing next, and what can wait.

What happens after the investigation

If a repair is needed, you can decide whether to proceed once you understand the options and likely costs. If the appliance is found to be unsafe, you’ll be advised on immediate steps and the safest route to restore heating and hot water. You’ll also receive practical guidance to reduce repeat issues, such as pressure management or system maintenance recommendations.