Plumbing · Putney, London
Central Heating Repair in Putney
When the heating fails, the boiler gets the blame, but plenty of cold houses have a perfectly good boiler and a fault somewhere in the circuit around it: a seized pump, a stuck zone valve, a blocked pipe, a thermostat that has lost its mind. [Honest Plumber Putney](/) takes the call on 07782 232151, helps you narrow it down on the phone, and passes the job to an independently owned partner company that quotes in writing before work starts.
Published London figures put a central heating repair where the boiler is not heating at roughly £100 to £280, and a wider UK index for 2026 gives £150 to £600 depending on the part and the labour. A system power flush to BS 7593 is published at £300 to £600. We quote those as ranges only; the partner company gives you the real price.
Our patch has plenty of heating systems that have been altered. West Putney's Edwardian houses were built for coal fires, then heated by gravity systems, then by modern boilers, with extensions and loft rooms added to pipework that was never designed for them. Cold radiators on the top floor often come down to balancing, not breakdown.
In Roehampton, the question is often who owns the system. The Alton Estate uses block risers and communal arrangements, and Wandsworth Council froze district heating and hot-water charges for more than 3,000 residents in 2022, so a flat there may have no boiler of its own. Cottages on the Dover House Estate have private systems and their own faults.
Heating failure in winter is urgent for children, the elderly and anyone unwell. Say so on the call, and we will treat the job accordingly.
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Heating Faults We Arrange
Systems fail in a handful of repeatable ways.
No Heat or Patchy Heat
If the boiler fires but the radiators stay cold, look to the pump, the motorised valve or a blocked circuit. If some rooms warm and others do not, the system probably needs balancing or a flush. The partner company traces the heat from the boiler out, rather than changing parts in turn.
Pumps, Valves and Controls
A noisy or seized circulating pump, a two-port or three-port valve stuck in the wrong position, or a thermostat and programmer that no longer signal the boiler can all leave you cold. Published London pump prices sit at £150 to £280. Controls faults are often cheaper than people expect.
Sludge, Air and Pressure
Black sludge inside radiators, repeated air, falling pressure or a boiler that overheats and shuts down point to a system that needs cleansing and a leak found. Power flushing to BS 7593 and a magnetic filter protect the boiler afterwards, and the quote spells out whether a flush is truly necessary.
What's Included
How We Approach a Heating Fault
Diagnose the circuit, then fix the part.
Phone Triage First
We ask what the boiler display shows, which rooms are cold and whether the pressure is dropping, so the right partner company comes with the right parts.
Trace the Heat
The partner company follows the heat from boiler to pump to valves to radiators, and tells you what they found before suggesting a repair.
Honest About Age
If the system is worn out and repairs will only keep recurring, you hear it plainly, with the boiler replacement route and its published cost side by side.
Tips
Heating Symptoms and Likely Causes
A reading guide before the engineer arrives.
What You Might Notice
Symptoms worth telling us about.
- Boiler on, radiators cold: pump or valve
- Hot downstairs, cold upstairs: balancing or air
- Radiators cold at the bottom: sludge
- Boiler pressure dropping: a leak on the circuit
- Heating runs all the time: thermostat or programmer
What You Can Check
Simple checks that save time.
- Look at the boiler pressure gauge
- Check the thermostat batteries and the programmer
- Make sure radiator valves are open
- Bleed any radiator cold at the top
- Note any error code on the boiler display
The Difference
Heating Repair Across SW15, SW13 and SW14
Local buildings, local heating quirks.
West Putney: Altered Systems
Houses along Colinette Road, Dealtry Road and Howard's Lane have been extended and subdivided. Pipework changed over time, so the far radiator is the first to complain.
Roehampton: Estate, Cottage, Mansion
Communal risers in Alton Estate blocks belong to the landlord, Dover House cottages have private systems and Roehampton Village mansions have large, old ones. Each needs a different first question.
Barnes and East Sheen: Older Stock
Barnes Village and the riverside streets, and East Sheen's terraces and flats, hold plenty of older pipes. Corrosion and sludge are common, and the partner company explains what a flush can and cannot achieve.
A heating fault may be the boiler itself, so see emergency boiler repair and boiler installation & replacement, and single cold panels are covered under radiator repair. A system that loses pressure may be leaking, so read leak detection & repair and burst pipe repair. Everything is listed under services, with local notes for Roehampton and West Putney.
What Central Heating Repair Means
Central heating is a circuit: a boiler heats water, a pump pushes it round, valves and controls decide where it goes, and radiators or underfloor loops give the heat up. Central heating repair is fixing any link in that circuit other than the boiler's own gas side. That distinction matters, because the boiler is the part that needs gas work, and gas work is done to the Gas Safety (Installation and Use) Regulations 1998.
If you smell gas, leave the property and call the National Gas Emergency number on 0800 111 999 before ringing us.
What Affects the Price
Which Part Failed
Controls are the cheapest, followed by valves and pumps, then circuit repairs that need floors lifted. A heat exchanger or a boiler PCB is a boiler repair, and its published London range is higher.
Cleansing and Protection
A system cleanse, filter and inhibitor protect everything you have just paid for. The quote shows each as a separate line so you can see what is essential and what is optional.
Time of Day
Out-of-hours work costs more. Published London rates for boiler repairs run higher on weekday evenings, weekends, bank holidays and overnight. The partner company states any such uplift in writing.
Repair, Rebalance or Replace the System?
A system that has been patched three times in a winter deserves an honest conversation. If the boiler is old, the pipework is leaking in several places and the radiators are corroded, spending on repairs may only delay the bill. The partner company can set the repair price beside a replacement route, and the choice is yours.
Standards used on the work include Building Regulations Part L for efficiency, BS 7593 for cleansing and the manufacturer's instructions for every appliance.
Balancing: The Cheap Fix People Forget
Balancing means adjusting the lockshield valves so each radiator gets its fair share of hot water. In a house where the front rooms bake and the back bedroom stays cold, it is often the whole answer, and it costs far less than a new pump or boiler. It takes patience, a thermometer and a note of each valve's setting, and it should be done again after any radiator is added or removed.
Zones and Timers
Many Putney houses have been given a second zone for a loft conversion or an extension. A zone valve that sticks leaves that floor cold while the rest warms. Ask the partner company to label the valves and explain the programmer to you, so you know how your own heating works.
Winter Preparation
Check the pressure in autumn, bleed the radiators and run the heating for a few minutes in summer to keep pumps and valves from seizing. These small habits cost nothing, and if something still fails, ring the line and we will arrange the repair.
Straight Answers
How much does central heating repair cost in Putney?
A London central heating repair where the boiler is not heating is published at about £100 to £280, and a UK index for 2026 gives £150 to £600 depending on the fault. Those ranges are indicative and not our quote. The partner company who attends diagnoses the fault and gives you a written price before doing anything.
My boiler is on but the radiators are cold. Why?
The boiler is producing heat but it is not getting round the circuit. Common reasons are a failed circulating pump, a motorised valve stuck shut, a blocked pipe or sludge. The partner company traces the heat from the boiler outwards, so you pay for the actual fault and not for a series of guesses. If you tell us what the boiler display shows, we can usually send the right parts first time.
Do I need a power flush?
Only if the system shows signs of sludge: radiators cold at the bottom, discoloured water, a noisy boiler or frequent pump failure. A power flush to BS 7593 is published at about £300 to £600 in London. The partner company should explain why it is needed and offer a lower-cost alternative where one genuinely works.
Why is the top floor always cold?
Heat rises, but the usual cause is air or poor balancing. In older West Putney houses that have been extended, pipe runs to upper floors are long and may be undersized. Bleeding the radiators and balancing the system often fixes it, and if not, the partner company can look at the pump speed and pipe sizing.
My heating pressure keeps dropping. Is that a leak?
Probably, if you have to top it up repeatedly. The leak could be at a radiator valve, a joint, the expansion vessel or a pipe under the floor. Each top-up also brings fresh minerals into the system, which is not helpful in hard water. Ring us before the boiler locks out, and we will arrange a partner company.
Is a faulty thermostat a big job?
Not usually. A thermostat or programmer that has failed, lost its signal or run out of battery is among the cheapest heating faults to fix. The partner company checks the controls early in the visit, since it is much better to swap a small unit than to start dismantling the boiler. Tell us the make if you know it, and the replacement is often done within a single visit.
Who looks after heating in a communal block?
In estate blocks and mansion flats on communal heating, the landlord or managing body usually owns the plant and risers. Faults inside your own flat, such as radiators and valves, may still be your responsibility. We ask where the heat comes from when you ring, so you are not sent a partner company for a fault that belongs to someone else.
Can I just bleed the radiators myself?
Yes. Bleeding is a simple job with a radiator key, done with the heating off, and it cures cold tops. Check the boiler pressure afterwards and top up if needed. If you are bleeding often, air is getting into the system, which a partner company should find and fix, because repeated bleeding hides a real fault.
Does hard water damage central heating?
A sealed system should not keep taking in water, so scale is less of a worry than in a hot-water cylinder or combi. But where a leak means constant top-ups, the hard Putney Heath supply at 257 mg/l calcium carbonate adds minerals each time. Finding and curing the leak matters more than any additive.
What if the heating fails on Christmas Day?
The line is open all hours, bank holidays included, and we pass the job to the partner company that can come out soonest. Out-of-hours work is published at higher rates, around £180 to £320 for a bank holiday boiler repair, and the partner states the price in writing first. We never promise an arrival time before they confirm it.
What if the repair does not hold?
Ring us on 07782 232151. We contact the partner company that did the work and chase them until they respond, because we stand behind getting you an answer. Any warranty or return visit is between you and the company that quoted and invoiced the job. You do not need to hunt for who to call.
