Boiler Repair & Servicing

No Hot Water Repair

No hot water usually comes down to one failed component rather than a system at the end of its life, and we will tell you honestly which it is. We find the fault, explain what is causing it, and get dependable hot water back to every tap in the house.

Call 01273 911551
Grey unvented cylinder with copper tails and cylinder thermostat, red and white expansion vessels behindGrey unvented cylinder with copper tails and cylinder thermostat, red and white expansion vessels behind

What's involved

Hot water fails in a handful of predictable ways, and here is what we check, repair and test.

Fault Diagnosis

Working out whether the problem sits with the boiler, the controls, the cylinder or the pipework, before any parts are changed.

Boiler and Gas Repairs

Ignition faults, diverter valves, thermostats and gas supply problems on domestic boilers, carried out under our Gas Safe registration.

Cylinders and Immersions

Vented and unvented hot water cylinders, immersion elements, thermostats and the controls that feed them.

Testing and Handover

Running several outlets together to check the temperature holds, then setting the controls sensibly and showing you how they work.

When the hot water stops

Losing hot water goes from mildly annoying to genuinely disruptive by about the second morning. The good news is that it is usually a single component that has given up rather than a whole system that needs replacing, and a proper diagnosis normally tells us which.

The first question we ask is a simple one: has the hot water gone everywhere, or only at one tap? That answer alone splits the problem in half. Nothing anywhere points at the boiler, the cylinder or the controls; nothing at a single outlet points at that fixture, its cartridge, or the pipework feeding it.

Diagnosis first, parts second. Changing components in the hope of a fix is how people end up paying twice.

How we work it out

We start at the controls, because a surprising number of no hot water calls turn out to be a programmer that lost its schedule after a power cut, or a cylinder thermostat sitting far lower than anyone realised. From there we work through the system properly.

On a combi boiler, hot water and heating are handled by different parts, which is why the heating can carry on working while the hot water disappears. A stuck diverter valve, a failed flow sensor or a scaled plate heat exchanger will each produce that exact symptom, and each is repairable.

On a system or regular boiler with a cylinder, we check that the boiler is firing, that the hot water zone valve is opening, that the cylinder thermostat is calling correctly, and, on an unvented cylinder, that the immersion, expansion vessel and controls are all behaving.

Work on the gas side is domestic and is carried out under our Gas Safe registration, 568345. We are also an accredited Vaillant installer, which helps when a Vaillant boiler is the thing that has stopped.

More information

Faults that most often cause it

  • A programmer or timer that has lost its settings
  • A cylinder or boiler thermostat set too low, or failed outright
  • A stuck diverter valve on a combi boiler
  • A scaled or blocked plate heat exchanger
  • A failed immersion element or immersion thermostat
  • A hot water zone valve that is not opening
  • Ignition or flame sensing faults stopping the boiler firing
  • An airlock, or an isolation valve left partly closed after other work

Putting it right, and proving it

Once we know the cause, we explain what it is and what fixing it involves before we start. If a part is needed, you will hear what it is and why. If a boiler is genuinely past sensible repair, badly corroded or failing again and again, we will say so plainly rather than keep charging to patch it, and we can talk through replacement instead.

After the repair the system is tested rather than assumed. We run more than one outlet at a time, check the temperature holds steady instead of sagging after a minute or two, look over the joints we have disturbed, and set the controls to something sensible before we leave.

A tap that runs hot for a moment is not a repair. It has to hold under real use.

If you let a property, we can carry out the domestic gas safety check and issue the CP12 landlord gas safety certificate at the same visit, which saves calling us out twice.

We are based in Woodingdean and cover Brighton, Hove, Worthing, Lewes, Shoreham-by-Sea, Haywards Heath, Seaford, Burgess Hill and surrounding Sussex towns, and you are welcome to call in at 58 Warren Road if you would rather talk it through in person.

Worth considering

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Cold radiators or a system that will not fire, traced to the fault and repaired at source, for homes across Brighton, Hove and Sussex.

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Boiler Fault Diagnosis

Gas Safe boiler fault diagnosis for homeowners in Brighton, Hove and Sussex, finding the real cause before any repair goes ahead.

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Gas Safe registered fixes for low, high or fluctuating boiler pressure, done properly and tidily across Brighton, Hove and nearby Sussex towns.

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Before you book

Straight answers to the questions we are asked most when the hot water has gone.

Why has my hot water stopped but the heating still works?
On a combi boiler the hot water and the heating are handled by separate components, so one can fail while the other carries on. A stuck diverter valve, a failed flow sensor or a scaled heat exchanger will all do it. On a system with a cylinder, the same split usually comes from the hot water zone valve or the cylinder thermostat.
Is there anything safe to check before calling us out?
Yes. Check whether the hot water has gone at every tap or only one, look at whether the programmer has lost its schedule after a power cut, and if the water is heated electrically, check the breaker has not tripped. Leave gas valves, burners and internal electrics well alone; that is work for a registered engineer.
Do you work on electric hot water as well as gas?
Yes. As well as domestic gas boilers we work on immersion heaters, cylinder thermostats and the controls around them, so an electrically heated cylinder is well within our scope. Either way we diagnose the fault first rather than assuming the boiler is to blame.
Are you Gas Safe registered?
Yes. We are Gas Safe registered for domestic gas work, registration 568345, and the registration is held by the business. We are also an accredited Vaillant installer.
What if the boiler cannot be repaired?
If it is badly corroded, failing repeatedly, or genuinely beyond sensible repair, we will tell you plainly instead of charging for another patch. We will explain what has failed and why it is not worth chasing, then talk through replacement options. The decision stays yours, made with the facts in front of you.
Can you sort a landlord gas safety certificate at the same time?
Yes. We carry out domestic gas safety checks and issue CP12 landlord gas safety certificates, so if we are already on site for a hot water fault it makes sense to do both in one visit. The certificate covers the gas appliances and pipework in the property.
Which areas do you cover?
We are based in Woodingdean and cover Brighton, Hove, Worthing, Lewes, Shoreham-by-Sea, Haywards Heath, Seaford, Burgess Hill and surrounding Sussex towns. Our premises are at 58 Warren Road in Woodingdean, and you are welcome to call in.
How do I get a price for a no hot water repair?
Call us on 01273 911551 and describe what has happened: whether the hot water has gone everywhere or at one tap, what the boiler is doing, and whether anything changed just before it stopped. That usually tells us what we are likely to be dealing with and what the work should involve. You can also call in at 58 Warren Road in Woodingdean.

Let's get your hot water back

Tell us what the boiler is doing and which taps are affected, and we'll take it from there.

Call 01273 911551