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Boiler Pump Replacement Cost (UK, 2026)
A failing central heating pump means cold radiators, strange noises and, eventually, no heating at all. Here's what a replacement realistically costs in 2026, how to spot the warning signs, and why this is a job for a qualified engineer.
Quick answer
Replacing a central heating circulation pump in the UK typically costs in the region of £185–£350 fitted in 2026, depending on the type and quality of pump, how easy it is to reach and your region.
An external standalone pump on accessible pipework sits at the cheaper end, while a pump built inside a combi boiler costs more because of the strip-down time and manufacturer-specific part.
Because the pump is on the sealed heating circuit (and, in a combi, behind the casing), replacing it is a job for a Gas Safe registered engineer, not DIY.
What does the central heating pump do?
Your central heating circulation pump (sometimes called the circulator) is the component that pushes hot water around the system — out from the boiler, through the pipework and radiators, and back again.
On a modern combi the pump is built inside the boiler casing; on older system and heat-only setups it may be a separate unit mounted in an airing cupboard or near the cylinder. Either way, when the pump weakens or seizes, heat simply stops moving around the house.
Because the pump sits on the sealed water circuit and, in a combi, behind the boiler casing, replacing it is an engineer's job — not a DIY task. We'll come back to that.
How much does a boiler pump replacement cost in 2026?
As a rough guide, replacing a central heating circulation pump in the UK typically costs in the region of £185–£350 fitted. The spread depends on the type and quality of pump, how easy the existing unit is to reach, your region, and whether the engineer needs to drain down the system to swap it out.
| Cost element | Indicative 2026 range |
|---|---|
| Replacement pump (external/standalone) | £90–£180 |
| Labour (typically 1–2 hours) | £80–£180 |
| Internal combi pump (part only) | £100–£220 |
| Typical total, fitted | £185–£350 |
An external pump on accessible pipework is usually the cheaper end of the range. A pump buried inside a combi boiler costs more because of the strip-down time and the manufacturer-specific part. If the engineer finds the system is heavily sludged while they're in there, they may also recommend a chemical flush, which adds to the bill.
That £185–£350 band covers the typical straightforward job — but it's worth knowing the realistic full range is wider.
Homeowners have reported simple supply-and-fit swaps from around £145 at the bottom end, rising to roughly £500 or more for awkward installs — and in one reported case as much as ~£760 for a six-hour-plus job that needed the system drained and extra parts replaced over two visits.
So if your quote sits above the typical band, it isn't automatically a rip-off: long, fiddly or out-of-hours jobs genuinely cost more. (Figures indicative, last checked 2026.)
Why it varies: emergency or out-of-hours call-outs, the need to drain and refill the system, awkward access (under floorboards, in a tight cupboard) and premium pump brands can all push the figure higher. Always ask for a written, itemised quote before work begins.
Regional price guide
Where you live makes a noticeable difference, almost entirely through labour rates. London and the South East typically add around £100–£150 to a fitted total compared with the lowest-cost regions, while the North, Scotland and Wales tend to sit at the more affordable end.
The fitted totals below are indicative 2026 ranges for a standard replacement and will move with access difficulty, pump choice and whether a drain-down is needed.
| Region | Indicative fitted total (2026) |
|---|---|
| London | £250–£350 |
| South East | £220–£330 |
| Midlands | £190–£300 |
| North of England | £175–£280 |
| Scotland & Wales | £180–£290 |
Indicative regional ranges, last checked 2026. Treat them as a sense-check on quotes, not a fixed price — your actual cost depends on the pump, the access and the state of your system.
Signs your circulation pump is failing
Pumps rarely die without warning. Look out for these symptoms:
- Noise. A healthy pump runs with a soft hum. Loud humming, buzzing, vibrating or rattling often points to worn bearings or trapped air. We cover this in more detail in our guide to a noisy central heating pump.
- Radiators cold despite the boiler firing. If the boiler is hot but the radiators stay cool, the pump may not be moving water around the circuit.
- The pump body is hot but the pipes aren't. Heat building up in the pump itself, rather than in the flow pipe, suggests it's seized or struggling.
- Leaks around the pump. Drips from the pump's seals or unions can point to a failing internal gasket.
- No vibration at all. If you carefully rest a hand on an external pump and feel nothing while the heating is calling for heat, it may have stopped completely.
Try these safe checks first. Some "no circulation" complaints aren't the pump at all. As a homeowner you can safely bleed your radiators, top up system pressure to 1–1.5 bar (cold) via the filling loop, check the thermostat and programmer settings, and confirm the boiler's fuse and power.
If the heating still won't circulate after that, book an engineer rather than opening the boiler.
Choosing the right pump
The two names you'll most often see are Grundfos and Wilo — both long-established manufacturers used widely across UK heating systems. Many combi boilers use a manufacturer-branded pump head that is, in effect, an OEM version of one of these.
The single most important thing is that your engineer fits a like-for-like replacement matched to your system's flow rate and head pressure, not simply the cheapest unit on the van — and, where the work touches a gas boiler, a Gas Safe-appropriate part.
A pump that's too weak won't shift enough water; one that's oversized wastes energy and can be noisy.
Common like-for-like options you may see quoted include:
| Pump | Indicative part price (2026) | Energy rating |
|---|---|---|
| Wilo Yonos PICO | £90–£120 | A-rated (high-efficiency) |
| Grundfos UPS3 15-50/65 | £110–£140 | A-rated (low EEI ~0.20) |
| Grundfos ALPHA (e.g. ALPHA3) | £160–£200 | A-rated (high-efficiency) |
Indicative part-only prices, last checked 2026; fitting is extra. Exact model and head rating (e.g. 5m or 6m) must be matched to your system by the engineer.
Energy efficiency: is an A-rated pump worth it?
If your existing pump is an older fixed-speed unit, upgrading to a modern A-rated variable-speed pump is one of the few like-for-like swaps that can actually save you money over time.
Older fixed-speed pumps run flat-out whenever the heating calls for heat (often 60–100W); A-rated variable-speed pumps modulate to match demand and may draw as little as 5–45W, which can cut the pump's own electricity use substantially.
As an indicative figure, that can mean savings in the region of £30–£40 a year versus a tired older fixed-speed pump — enough that the upgrade can pay for itself within a few years. (Indicative saving, last checked 2026; your real-world figure depends on your pump, run-time and electricity tariff.) Since you're paying for the labour either way when an old pump fails, it's usually worth asking the engineer to fit an efficient A-rated replacement rather than the cheapest equivalent.
How long does a central heating pump last?
A good-quality circulation pump typically lasts around 10–15 years. That lifespan is shortened by poor system-water quality — sludge and limescale are the main culprits, as the abrasive debris wears the bearings and impeller.
Keeping the correct dose of corrosion inhibitor in the system, and fitting a magnetic filter, helps the pump (and the rest of the boiler) reach the upper end of that range.
If your pump is already past the 10-year mark and showing the warning signs below, replacement rather than repair is usually the sensible call.
Repair vs replace the pump
A pump that has simply seized after a long summer idle can sometimes be freed without a full replacement: many modern pumps have a manual de-blocking screw, and an engineer can occasionally free a stuck rotor or replace a worn part rather than swap the whole unit.
That's most worth trying on a relatively young, good-quality pump that's otherwise sound.
A full replacement is the right call when the pump is old (near or past 10–15 years), leaking from its seals, noisy from worn bearings, repeatedly seizing, or when the cost and disruption of repeated call-outs outweigh fitting a new, more efficient unit.
Because freeing or servicing a pump still means working on the sealed circuit — and, on a combi, behind the casing — it's an engineer's diagnosis, not a homeowner one.
Why this is a Gas Safe / qualified engineer job
Replacing a circulation pump means working on the sealed heating circuit, isolating and draining water, and — on a combi — opening the boiler casing. None of that is suitable for DIY.
Wherever the work touches the boiler itself, it must be carried out by a Gas Safe registered engineer; you can verify any engineer's registration at gassaferegister.co.uk. Never attempt work on the gas valve, pipework, flue, sealed circuit components or boiler casing yourself.
If you smell gas, leave the property and call the National Gas Emergency line on 0800 111 999.
The legacy "CORGI" scheme is sometimes still mentioned, but it was replaced by the Gas Safe Register back in 2009 — always check the current register.
Is a new pump cheaper than a new boiler?
Usually, yes. A pump swap is a single-component repair, so if the rest of your boiler is sound it's a sensible fix. The maths changes if your boiler is old, out of warranty and prone to other faults — at that point a pump replacement can be money spent on a system nearing the end of its life.
Our wider boiler repair cost guide sets out how individual fixes stack up against the cost of replacing the whole appliance.
Where boiler cover fits in
This is where many homeowners weigh up a policy. A central heating boiler cover plan that includes the wider system can mean a failed pump is repaired or replaced for the price of your monthly premium (and any excess), rather than a one-off bill of a few hundred pounds.
The key is reading the small print: not every policy covers system components like pumps, and some apply an excess or exclude pre-existing faults. If you're not sure whether a plan is right for you, our overview of whether boiler cover is worth it walks through the trade-offs.
Compare boiler cover that includes system components
See policies from a selected panel of UK providers and check which ones cover the pump, radiators and wider central heating system.
Compare boiler coverFrequently asked questions
How long should a central heating pump last?
A good-quality circulation pump typically lasts around 10–15 years, though this varies with system water quality. Sludge and limescale shorten a pump's life, which is why inhibitor and the occasional flush matter.
Can I replace the boiler pump myself?
No. The pump sits on the sealed heating circuit and, in a combi, behind the boiler casing. Where the work touches the boiler it must be done by a Gas Safe registered engineer. Homeowner-safe jobs are limited to bleeding radiators, topping up pressure via the filling loop, checking the thermostat and power, and a single front-panel reset.
Will boiler cover pay for a new pump?
It depends on the policy. Some plans cover the boiler only, while others extend to the wider central heating system, including the pump. Always check what's listed as covered and whether an excess or pre-existing-fault exclusion applies before you assume a pump is included.
My pump is noisy but the heating still works — is it urgent?
A noisy pump that's still circulating water isn't an emergency, but it's a warning sign worth acting on before it fails completely. See our noisy central heating pump guide, and have an engineer assess it if the noise persists after you've bled the radiators and checked for trapped air.
Does the pump being inside the combi make it more expensive to replace?
Often, yes. An internal combi pump means more strip-down time and a manufacturer-specific part, which is why an internal swap tends to sit at the higher end of the £185–£350 range compared with a standalone external pump on accessible pipework.
Boiler Cover UK is an independent comparison site and earns commission from some providers. Prices are indicative 2026 UK figures and for general information only — not a quote or financial advice. We show a selected panel of providers, not the whole market.