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Replace your heating pump.
Grundfos, Wilo or DAB — pump swapped, system bled and flow rates re-set.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Costs, timelines, pitfalls and the right questions to ask before any central heating starts on central Heating Pump Replacement.
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Four moves that separate a smooth job from a nightmare.
Pump runs but no heating
Often the diverter valve, not the pump. Diagnostic before parts replacement.
Noisy pump
Air in system, sludge, or worn bearing. Bleed first, then power flush, then replace if needed.
Wrong pump size
Pump must match system flow rate. UPS2 25-60 is the standard domestic spec.
Pump seized after holiday
Pumps unused for weeks seize up. Pre-emptive run-cycle prevents.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Grundfos UPS2 modulating pumpMost common UK
£120–£200
Wilo Yonos PICO modulatingEquivalent quality
£110–£190
Old-style fixed-speed pumpNow uncommon
£50–£100
Install labour2–3 hours plus drain/refill
£120–£300
Standard pump replacement fittedMid-range
£200–£450
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
InfographicThe Central Heating briefing.
Infographic
Central Heating quick-view
The circulating pump pushes hot water round your central heating. Most fail at 8–12 years. Expect to pay £180–£500 for a UK heating pump replacement depending on pump model and access.
What Does the Work Involve?
Engineer isolates pump via valves either side. Drains pump section. Removes old pump. Fits new pump (same flange spacing, similar model — Grundfos UPS2 or Wilo Yonos are UK standards). Refills and bleeds system. Tests flow rate. Modern pumps are modulating (variable speed) — far more efficient than old fixed-speed pumps.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Grundfos UPS2 modulating pump | 120 | 200 | Most common UK |
| Wilo Yonos PICO modulating | 110 | 190 | Equivalent quality |
| Old-style fixed-speed pump | 50 | 100 | Now uncommon |
| Install labour | 120 | 300 | 2–3 hours plus drain/refill |
| Standard pump replacement fitted | 200 | 450 | Mid-range |
| Awkward access premium | +£100 | +£200 | Cylinder cupboard, etc |
How Long Does It Take?
Pump replacement: 2–3 hours including refill and bleeding.
DIY or Professional?
DIY-able for confident householder with system-draining knowledge. Most homeowners call a plumber.
Choosing the Right Tradesperson
Heating engineer or plumber. Modulating pumps (variable speed) are the modern standard — saves energy. Brands: Grundfos UPS2, Wilo Yonos PICO. Generic pumps cheaper but shorter life.
UK Regulations
EU Ecodesign Directive: only A-rated modulating pumps available since 2013. New installations must comply.
Common Problems
- Pump runs but no heating: Often the diverter valve, not the pump. Diagnostic before parts replacement.
- Noisy pump: Air in system, sludge, or worn bearing. Bleed first, then power flush, then replace if needed.
- Wrong pump size: Pump must match system flow rate. UPS2 25-60 is the standard domestic spec.
- Pump seized after holiday: Pumps unused for weeks seize up. Pre-emptive run-cycle prevents.
Frequently Asked Questions
How do I know my pump is failing?
Cold radiators (despite hot boiler), noise from boiler area, system pressure issues, boiler short-cycling. Pump motor humming but no flow = stuck/seized.
Modulating or fixed-speed?
Modulating only — fixed-speed is now non-compliant for new installs. Saves 50–80% on pump electricity vs old fixed-speed.
How long does a heating pump last?
Quality pumps (Grundfos, Wilo): 12–18 years. Generic: 6–10 years.
Can I run my system without a pump?
Briefly, in emergency, with manual circulation. Long-term: no — boiler will overheat from inadequate flow.
Will replacing the pump fix my heating issues?
Only if the pump is actually the problem. Diagnostic first — often the issue is elsewhere (sludge, valve, boiler).
Why did my pump fail?
Sludge build-up clogs the impeller. Air in system damages bearings. Old age — bearings wear out at 8–12 years.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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