Boiler Repair in Chiswick and Bedford Park

Gas Safe engineers across W4, 24 hours a day.

Answered 24 hours a day by a technical customer service member.

What is the boiler doing?

Most of these houses run an S-plan system, which means the heating and the hot water fail independently.

Gas Safe registered engineers
An engineer as soon as we can, booked around you
Cylinder and unvented systems as well as combis
Parts guaranteed for a year, rates agreed before work starts

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.

Google Reviews

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"Efficient and amiable service all round. Even managed to save me money by fixing a thermostat that we thought was broken."
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Prefer we call you? Request a call back

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 Chiswick, and the whole of London

Tell us the address and you will get an honest answer about timing. View areas we cover

What happens when you call

Three steps. The first one usually tells us most of it.

Tell us where you are and whether there is a cylinderIn W4 most houses still have one. That single answer decides which of the two appliances we are diagnosing, before anybody sets off.
You will know what has probably failed, and when we can comeWe tell you the likely part and a realistic slot. If we cannot reach you today we say so on the phone, rather than after you have waited in.
Nothing starts until you have agreed the costThe engineer runs a full diagnostic, then puts the fault, the part and the labour in writing. Parts are guaranteed for a year.

If a repair is not worth doing, we will say so on the phone. Call 0203 868 6134.

We come to every street around here

Almost nobody says they live in W4. They say Bedford Park, or Grove Park, or just Chiswick.

Names we hear on W4 calls, and the postcodes around it

Grouped by postcode, because that is the one part of an address everybody knows.

W4Chiswick, Bedford Park, Grove Park, Chiswick Park, Turnham Green, Strand-on-the-Green and Gunnersbury
W3Acton, Acton Green, South Acton and Acton Central
TW8Brentford and Boston Manor
W6Hammersmith, Ravenscourt Park and Brook Green
W12Shepherd's Bush and Askew Road

We work right across London, north and south of the river. If yours is not here, ring and tell us the address.

Bedford Park was the first garden suburb, and it still behaves like one

Big Victorians, mostly undivided, nearly all on an S-plan system.

Bedford Park went up between 1875 and 1886 to designs by Norman Shaw, the first suburb of its kind anywhere, and it is a conservation area with a good number of listed buildings inside it. The Grove Park and Chiswick Park grids either side are later and larger. Along the High Road and towards Turnham Green there are more conversions, but the bulk of W4 is whole family houses that kept their hot water cylinder. The S-plan is what makes this area diagnostically clean. A whole house here is usually plumbed with two motorised valves, one for heating and one for hot water, working independently. So heating on and hot water off is almost never the boiler. It is the hot water zone valve, the cylinder thermostat or the coil, and each of those costs a fraction of an appliance. The older arrangement, a Y-plan with a single mid-position valve, behaves differently: one part failing takes out both, or leaves you with heating you cannot switch off. Establishing which of the two you have is the first thing an engineer should do, and it decides the whole diagnosis.

Did you know Down at Strand-on-the-Green and the riverside roads the plant is often in a basement, below the drain. That means a condensate pump rather than a gravity run, and a condensate pump is a part that fails on its own without anything being wrong with the boiler at all.

Heating fine, hot water gone

The commonest call from W4, and on an S-plan it is one valve.

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 an S-plan the valve is the first thing to check, because it is the only component in the system whose sole job is hot water. When its actuator fails the boiler still fires perfectly for the heating and the tank simply never gets any flow. That is a part, not an appliance. 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. Our engineers hold both, so where there is a cylinder it is one visit and one charge rather than two. See unvented cylinder repair.

Water running from a pipe outside? If it comes from a tundish, the cylinder is discharging and a safety device has failed. Turn the boiler off, isolate the cold feed if you can find the stopcock, and call. That is an emergency, not a booking for next week.

What hard water is doing to your boiler

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 Bedford Park or Grove Park house that kept its cylinder it lands on the coil inside the tank instead, where it insulates the coil from the water it is meant to be heating. Same water, different part, and a scaled coil reads as a failing boiler often enough that boilers get condemned for it.

Two parts stop it, and they do different jobs. A scale reducer on the mains protects the hot water side. A magnetic filter on the return catches the magnetite that blocks exchangers and seizes pumps. Both go in during a yearly service, and a power flush deals with what is already in there.

Google Reviews

"Steve was very helpful and responsive"
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"Very happy with this company very and professionally service. Fixed my leaking TRV and after draining my system and the refilled and vented the air . Thank you I have heating now"
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"Took his time to listen to my concerns hence it was a nice job. Thank u so much"
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Repair or replace

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. Chiswick asks the replacement question more than most areas, and often for the right reasons: the houses are big, the systems are old enough to be a decision, and the households are the sort who plan rather than react. The question worth asking first is whether the appliance failed or the system around it did, because an S-plan valve, a pump or a scaled cylinder coil will fail the same way again on a new boiler. 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.

Nearby areas

Next door to here we cover Ealing and Northfields and Hammersmith and Shepherd's Bush. Everything else is on boiler repair in north London and areas we cover.

Esher, Claygate and Thames DittonPlant rooms and multiple appliancesView services Hampstead Garden Suburb and FinchleyOften two appliances in one houseView services Fulham and Parsons GreenTerraces and mansion flatsView services DulwichLarge detached, cylinders standardView services CroydonTown centre flats to Shirley detachedView services All areasEvery area we have written upView all

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.

Heating on, hot water off?

On an S-plan system that is almost always one valve rather than the boiler. Tell us which is working and which is not, and we can usually name the part before anybody sets off.

Call 0203 868 6134

Safety

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.

Common questions

Do you cover my street in Chiswick?

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.

My radiators are hot but there is no hot water. Do I need a new boiler?

Almost certainly not, and on an S-plan system it is usually one valve. The motorised valve that feeds the cylinder has one job, so when its actuator fails the boiler still runs the heating perfectly and the tank simply never gets flow. The cylinder thermostat and the immersion element are the other two candidates. See unvented cylinder repair.

How do I know whether I have an S-plan or a Y-plan?

Count the motorised valves near the cylinder. Two valves is an S-plan and the heating and hot water are independent. One larger valve with three pipes into it is a Y-plan, where a single part failing can take out both or leave heating you cannot switch off. It changes the diagnosis, so it is worth a look before you ring.

The boiler is in the basement and there is water on the floor. What is that?

Often the condensate pump rather than the boiler. Plant below the drain cannot run condensate away by gravity, so it uses a small pump, and that pump fails on its own without anything being wrong with the appliance. Turn the boiler off and call. That is an emergency rather than a booking for next week.

Do you repair Ideal and Worcester Bosch boilers in Chiswick?

Yes, and every other major make. Those two are the ones we open most in W4, usually system boilers feeding a cylinder. Glow-worm, Potterton and Viessmann are common in the conversions. If your boiler is showing a fault code, the brand pages explain what that code means for your make.

I am a landlord with a flat in W4. Can you do the certificate too?

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.

Will I know the cost before you start?

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.

Are you available at night and at weekends?

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.

The makes we see most in W4

Every major make, and the fault code pages often name the part before you ring.

The whole houses that kept a cylinder run system boilers, and in Chiswick the ones we open most often are Ideal, Worcester Bosch and Vaillant. The conversions along the High Road and towards Turnham Green run combis, where Glow-worm and Potterton are common, with Viessmann on anything specified in the last few years. We also work on the makes most firms will not: Alpha and Main turn up in flats where nothing larger would fit, and parts for both are still perfectly obtainable. If your boiler is showing a code, the make decides what it means. An Ideal L2 and a Worcester Bosch EA 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.

Google Reviews

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Book an engineer in Chiswick

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.

Call 0203 868 6134 Book an engineer online

Gas Safe registered. Unvented cylinder qualified. Parts guaranteed for a year. Covering London, north and south of the river, 24 hours a day.