Gas Safe registered
SW19 SW20
Gas Safe engineers across SW19 and SW20, 24 hours a day.
Answered 24 hours a day by a technical customer service member.
A good many houses up the hill still run a cold water tank in the loft, which changes the fault list completely.
No heating or hot water right now? Call 0203 868 6134. We will tell you the earliest realistic slot rather than the one you want to hear.
Two details to start. Add your postcode and whether there is a cylinder in an airing cupboard and we can usually tell you the likely part before we attend.
We cover Wimbledon, and the whole of London
Tell us the address and you will get an honest answer about timing.
View areas we coverThree steps. The first one usually tells us most of it.
If a repair is not worth doing, we will say so on the phone. Call 0203 868 6134.
Almost nobody says they live in SW19. They say the Village, or Wimbledon Park, or Southfields.
Names we hear on SW19 and SW20 calls, and the postcodes around them
Grouped by postcode, because that is the one part of an address everybody knows.
We work right across London, north and south of the river. If yours is not here, ring and tell us the address.
Which is a different system, with a different set of faults.
The Village and the roads around the Common are large Victorian and Edwardian detached houses, conservation area for much of it, and a good many of them were never converted to mains pressure hot water. They still run the original arrangement: a cold water storage tank in the loft, feeding a vented cylinder below it by gravity.
That system fails in ways an unvented one cannot. The ball valve in the loft tank sticks and the tank overflows or runs dry. The cold feed freezes in a cold snap, because it is running through an unheated loft, and the first sign is no hot water on the coldest morning of the year. And the pressure at a shower is decided by the height of the tank above the tap, not by the boiler, so an attic bathroom in a Village house is always the weakest outlet in the building.
That last one matters because it is regularly misdiagnosed. A weak shower on a gravity system is a pump job or a conversion, not a boiler job, and replacing a perfectly good appliance changes nothing at all.
Lag the loft tank and its pipework and you remove the commonest winter failure in this postcode entirely. It costs very little, it is not a Gas Safe job, and it is the one thing we recommend most often to houses up the hill.
The commonest call from SW19, and it is rarely the boiler.
On a stored system, heating that works and hot water that does not points at the cylinder side. Three usual culprits: the motorised valve that diverts flow to the tank, the cylinder thermostat, and the immersion element. Each costs a fraction of a new appliance and each gets mistaken for one.
On a vented system there is a fourth, and it is above your head. If the loft tank has run dry, frozen or lost its feed, the cylinder has nothing to heat. Everything downstairs looks and sounds perfectly normal, which is why this one gets diagnosed as a boiler fault more often than any other.
An unvented cylinder is a pressurised store, so working on one is notifiable and needs a G3 qualification on top of Gas Safe registration. Plenty of firms hold one and not the other, which is why a cylinder call so often becomes two visits. Our engineers hold both, so it is one visit and one charge. See unvented cylinder repair.
The one thing a yearly visit genuinely prevents.
London water comes off the Thames and the Lea, both of which run through chalk. It measures roughly 277 milligrams of calcium carbonate per litre, and that figure is much the same across the city.
Where it lands is what differs. In a combi it furs the plate heat exchanger and the hot water goes lukewarm. In a Village or Wimbledon Park house that kept its cylinder it lands on the coil inside the tank, so the tank takes longer and longer to recover between baths. On a vented system it also silts the base of the loft tank, which is worth looking at whenever anybody is up there.
Age does not decide it. The failed part does.
A pump, a diverter valve, a thermostat or a fan is a repair on almost any appliance, whatever its age. A failed main heat exchanger on a boiler well past ten years is the point where the arithmetic stops working, and we will tell you that rather than sell you the repair.
In a Village house the replacement conversation is usually really a conversion conversation: whether to move from a gravity fed system to mains pressure at the same time. That is a bigger job than a boiler swap and it is sometimes the right answer, but it should be a decision rather than something that happens by default because a boiler failed.
Our boiler replacement page sets out what a replacement actually involves, including what changes when a stored system is converted, and the costs guide explains what moves the figure.
That answer costs nothing. It is the one most people ring us for. Call 0203 868 6134.
Next door to here we cover Putney and Barnes and Kingston, Coombe and Surbiton. Everything else is on boiler repair in south London and areas we cover.
These are where we work most, not a boundary. An engineer attends anywhere in north London and south London. Tell us where you are and we will say plainly when we can get to you.
Weak shower upstairs?
On a gravity fed system that is a question about the tank height, not the boiler. A pump solves it and a new appliance does not, and it costs nothing to establish which you have.
If you smell gas: do not touch any switches. Open the windows, leave the property, then call the National Gas Emergency Service on 0800 111 999. That line is free and open 24 hours. Call them before you call us.
If a carbon monoxide alarm is sounding: get everyone out immediately, then call 999 if anyone feels unwell. Do not go back in until the property has been ventilated and checked.
If the boiler locks out repeatedly: try one reset. If it locks out again straight away, stop. Repeated resets hide a fault that is still there, and on a gas appliance that is not a risk worth taking.
Under the Gas Safety (Installation and Use) Regulations 1998, only a Gas Safe registered engineer may work on gas appliances. Never open the boiler casing yourself.
Yes. The names listed above are the ones we hear most, and they are nowhere near a complete list. We work right across London, north and south of the river. Ring and tell us the address and you will get a straight answer about timing.
On a vented system it is very often the cold feed in the loft, frozen. The cylinder has nothing to heat, so everything downstairs looks and sounds normal while the taps run cold. It is not a boiler fault, and lagging the tank and its pipework afterwards prevents it happening again.
Because on a gravity fed system the pressure at any outlet is decided by the height of the loft tank above it. An attic or second floor shower has the least height above it and is always the weakest point in the house. A pump solves it. A new boiler does not.
Almost certainly not. That points at the cylinder side: the motorised valve that diverts to the tank, the cylinder thermostat, or the immersion element, and on a vented system also the loft tank above it. All of those cost a fraction of an appliance. Our unvented cylinder repair page explains what is involved.
Yes, and every other major make, including the ones most firms will not touch. Those two are the ones we open most in SW19. Potterton is still common on the older vented installations, and Main, Ariston, Ferroli, Vokera, Biasi and ATAG all turn up here. If your boiler is showing a fault code, the brand pages explain what it means.
Yes, and on the same visit where the appliance passes, so a let property is not off the market twice. See landlord gas safety certificates. If the flat has no gas supply we cover electric boilers as well.
Yes. The rate is agreed on the phone before anybody sets off, and the engineer gives you a written breakdown of the fault, the part and the labour before any repair begins. Nothing goes ahead until you have seen it. Our costs guide sets out what drives the figure.
The line is answered 24 hours a day by a technical customer service member, not a call centre reading from a script. In the middle of the night we will tell you honestly whether it is a tonight job or a first thing in the morning job.
Every major make, and the fault code pages often name the part before you ring.
The big houses run system boilers feeding a cylinder, and the ones we open most here are Worcester Bosch, Vaillant and Ideal, with Potterton still turning up on the older vented installations that were never touched. Raynes Park and the flats around the station run combis.
We also work on the makes most firms will not. Main, Ariston, Ferroli, Vokera, Biasi and ATAG all appear in SW19 and SW20, and parts for every one of them are still obtainable.
If your boiler is showing a code, the make decides what it means. A Worcester Bosch EA and a Vaillant F75 are different faults with different fixes, and neither of them on its own means a new boiler. Each brand page lists the codes for that make and what actually causes them.
The full list is on our boiler brands page, and general repairs are on boiler repair in London.
Tell us where you are and whether there is a cylinder in an airing cupboard. With those two answers we can usually name the likely part, give you the rate, and book somebody in, all on the one call.
Gas Safe registered. Unvented cylinder qualified. Parts guaranteed for a year. Covering London, north and south of the river, 24 hours a day.
