Gas Safe registered
KT17 KT19
Gas Safe engineers across KT17 and KT19, 24 hours a day.
Answered 24 hours a day by a technical customer service member.
Where a control has been discontinued, a modern replacement can usually be retrofitted rather than replacing the system.
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 Epsom, 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 KT17. They say Ewell Village, or Stoneleigh, or the Downs.
Names we hear on KT17 and KT19 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.
It usually means the control needs replacing, not the system.
KT17 and KT19 are large interwar and postwar family houses, most of them still storing hot water, and a great many of them running heating controls that were installed twenty or twenty five years ago and have never been touched since. That is the age where parts start disappearing.
A discontinued programmer or cylinder thermostat is a genuine problem, and it is a smaller one than it sounds. Households are regularly told that because a control is obsolete the system has come to the end of its life. In almost every case a modern control can be retrofitted to the existing wiring, or the wiring adapted to take one, for a fraction of what replacing the system would cost.
Where it genuinely does change the maths is a discontinued part inside the appliance itself. A heat exchanger or a gas valve that can no longer be sourced is a real reason to replace a boiler, and that is a different statement from a programmer on a wall. It is worth asking which of the two anybody quoting you actually means.
Wiring centres and cylinder thermostats are close to standardised, which is why a control from twenty years ago can usually be replaced with a current one. It is the appliance-specific parts, not the system parts, that genuinely go out of supply.
The commonest call from KT17, 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.
In a house with old controls there is a fourth, and it is the cheapest of the lot. A cylinder thermostat that has drifted or failed will simply never call for hot water, so the boiler is never asked to make any. Nothing is wrong with the tank, the valve or the appliance, and the part costs very little.
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.
Look it up rather than take anybody's word for it.
Most of London drinks water drawn from the Thames and the Lea and treated by Thames Water, and it measures roughly 277 milligrams of calcium carbonate per litre. This corner of the city is one of the places where that is not the supplier. Much of it takes its water from SES Water instead, drawn from chalk boreholes rather than from a river.
Scale does the same thing wherever it comes from. In a combi it furs the plate heat exchanger. On a stored system it coats the coil inside the cylinder, so the tank takes longer and longer to recover between baths. On an older system it also builds up around the cylinder thermostat pocket, which is one reason those readings drift with age.
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.
The question worth putting to anybody quoting a replacement here is which part is actually unobtainable. A programmer or a cylinder thermostat almost never is, because those are close to standardised. A heat exchanger or a gas valve for a discontinued appliance genuinely can be, and that is a real reason. They are very different answers and they get given in the same sentence.
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 Coulsdon and Sutton and Cheam. 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.
Told the part is obsolete?
Sometimes that is true and it still does not mean a new system. A modern control can usually be retrofitted to old wiring, and that is a much smaller job than the one you were probably quoted.
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.
It depends entirely which part. A programmer, a wiring centre or a cylinder thermostat is close to standardised, so a modern one can almost always be retrofitted to existing wiring for a fraction of the cost of a system. A discontinued heat exchanger or gas valve inside the appliance is a genuine reason to replace the boiler. Ask which they mean.
Often the cylinder thermostat rather than anything larger. If it has failed or drifted it never calls for hot water, so the boiler is never asked to make any. Nothing is wrong with the tank, the valve or the appliance, and the part costs very little.
Almost certainly not. That points at the cylinder side: the motorised valve that diverts to the tank, the cylinder thermostat, or the immersion element. All three cost a fraction of an appliance. Our unvented cylinder repair page explains what is involved.
Usually, and it is a good moment to do it because the wiring is already being touched. What matters is that the new control suits the system you actually have, particularly if there are two zones or a stored cylinder, rather than being fitted as though the house were a simple combi.
Yes, and every other major make. Those two and Vaillant are what we open most in KT17 and KT19, usually system boilers feeding a cylinder, with Glow-worm and Potterton on the installations they replaced. If your boiler is showing a fault code, the brand pages explain what it means for your make.
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 it has no gas supply we cover electric boilers as well.
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.
These houses run system boilers feeding a cylinder, and the ones we open most are Ideal, Worcester Bosch and Vaillant, with Glow-worm and Potterton on the installations they replaced. Viessmann, Alpha and Main all turn up as well.
Parts availability is the thing that varies between them rather than quality, and it is worth knowing where your make stands before a repair is written off. We will tell you plainly if a part genuinely cannot be sourced.
If your boiler is showing a code, the make decides what it means. An Ideal L2 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.
