Leaking cylinder or PRV dripping
A dripping pressure relief valve on an unvented cylinder can mean a failed expansion vessel, a faulty PRV, or a thermal fault. All need addressing — not ignoring.
Hot water repairs — Edinburgh & the Lothians
No hot water? We'll find the fault and get it back on.
Combi faults, unvented cylinders, immersions, cold showers, and pressure problems — diagnosed properly by Gas Safe engineers with unvented tickets in-house. Fixed call-out, honest advice, most faults fixed on the first visit.
Gas Safe registered (reg no. 953527)Unvented cylinder tickets in-houseSame-day attendance where possible
Hot water down?
Call first thing and we'll tell you honestly when we can be there and what the visit is likely to cost.
Hot Water
Response
Same-day where possible
Tickets
Gas Safe & unvented
Call-out
Fixed fee
Common Faults
Most hot water faults fall into a handful of categories.
Here are the hot water faults we see most often across the Lothians. If yours sounds like one of these, we've almost certainly fixed dozens of them already.
No hot water but heating works
Usually a diverter valve on a combi, or a failed motorised valve on a system with a cylinder. We diagnose properly rather than guessing at parts.
Hot water runs cold mid-shower
On combis, often a scaled plate heat exchanger or a failing flow sensor. On cylinders, usually an undersized system or a failed stat. Both are fixable.
Pressure problems
Low mains pressure at the tap, pressure loss in the boiler, or a noisy unvented cylinder. We check from the stopcock through to the outlet before committing to a fix.
Immersion heater not heating
Failed elements, failed stats, or tripped thermal cut-outs. We replace properly with the right rating, including the rubber seal — not a tape bodge.
Intermittent combi hot water
Hot water that drops out, pulses, or won't stay hot usually points to a flow sensor, a failing diverter, or combustion fault. We track it to the source on the first visit where possible.
Systems We Work On
Combi, unvented, or open-vent — one engineer for the whole job.
Hot water faults often cross over between plumbing and gas. Because every engineer on the van is Gas Safe registered, LPG certified, and holds the unvented cylinder ticket, the whole fix gets done without a second trade.
Combi boilers
Combi hot water faults
Diverter valves, plate heat exchangers, flow sensors, ignition and combustion faults, and pressure loss. All major brands — Worcester, Vaillant, Ideal, Baxi, Viessmann.
Unvented cylinders
Unvented cylinder work
Expansion vessel failures, PRV drips, thermostat replacements, and full unvented cylinder servicing. Unvented tickets held in-house — not subcontracted out.
Open-vent & immersions
Older cylinders and immersions
Traditional open-vent cylinders, immersion elements, tank thermostats, and cylinder stat replacements. Honest advice on when an upgrade to an unvented system actually makes sense.
How It Works
From the first phone call to working hot water.
No hidden fees, no pressure to replace a cylinder or boiler that can be fixed, and no subcontracted strangers turning up.
01
Call us and describe the fault
Tell us what the hot water is doing — or not doing — and we'll get a sense of whether it's a cylinder, combi, or plumbing issue before we set out. The more we know on the phone, the less we have to rule out on arrival.
02
We arrive and diagnose
A Gas Safe engineer checks the boiler, cylinder, valves, and supply side. Pressure, temperature, flow rate, and controls all get checked properly before any parts are ordered.
03
Honest recommendation
If it's a cheap fix, we say so. If the cylinder or boiler is at the end of its life and a repair doesn't make financial sense, we'll tell you — with the numbers — and let you decide.
04
Fixed or parts ordered
Most common hot water faults are fixed on the first visit. If a specialist part needs ordering, we schedule the return as soon as it arrives — no unnecessary second call-outs.
Hot Water FAQs
The questions we get asked most when hot water goes down.
Straight answers on response times, combi vs cylinder faults, unvented systems, and what a diagnosis visit costs.
What Comes Up Most
How fast we can attend a no-hot-water call
Combi vs cylinder hot water faults
Unvented cylinders, PRVs, and expansion vessels
What a diagnosis visit costs
Got a hot water fault right now?
Phone us with the boiler or cylinder make and what the hot water is doing — we'll tell you straight whether we can help, and when.
We aim to get to urgent no-hot-water calls the same day or the next working day for homes across Edinburgh, Midlothian, East Lothian, and West Lothian. Call us on 07784 066 853 and we'll tell you straight away when we can be there.
Hot water down?
Phone us and we'll get it sorted.
We cover Edinburgh, Midlothian, East Lothian, and West Lothian, and we aim to reach most urgent hot water calls the same or next working day.