Hot Water Fault Investigation

What this service covers

A structured investigation to pinpoint the root cause of hot water faults, with clear findings and recommended actions.

• Review of symptoms (no hot water, intermittent hot water, low pressure, temperature swings)
• Checks on the hot water source (boiler, cylinder, immersion heater, or combination setup)
• Inspection of key components such as valves, thermostats, pumps, and controls
• Testing for common causes like airlocks, blockages, scale, leaks, or sensor failures
• Safety checks where relevant (temperature, pressure relief, visible signs of overheating)
• Explanation of findings in plain English, plus options for repair

When a hot water fault investigation is most useful

This service is ideal when the issue keeps coming back, multiple fixes have not worked, or the symptoms do not point to one obvious part. It is also a sensible starting point if you are a landlord or small commercial client who needs a documented diagnosis before approving remedial work.

Common triggers include hot water running out too quickly, only getting lukewarm water, taps taking a long time to run hot, or hot water working in some outlets but not others.

What happens during the visit

The engineer will start by asking a few focused questions about the system, recent changes, and when the fault occurs. They will then carry out step-by-step checks and targeted tests to confirm where the problem is occurring, rather than swapping parts by guesswork.

Where access is required (for example to a cylinder cupboard, boiler area, or isolation valves), you will be guided on what is needed and why.

After the investigation

You will be talked through the cause of the fault and the options to fix it, with clear priorities if there is more than one issue. If repairs are needed, you can choose whether to proceed and when, based on the most appropriate solution rather than the quickest assumption.

Where helpful, you will also get practical advice to reduce the chance of repeat problems, such as pressure management, temperature settings, or maintenance actions.