Heatweb Specialists · All London
Heatweb HIU Repair & Service
Same-day Heatweb HIU callouts across Greater London. Service from £140, repair callout from £140 covering attendance and full fault diagnosis.
About Heatweb HIUs
Heatweb is a British manufacturer with a long history in the sector — the company says it built the first electronic HIUs back in the 1990s. Its units are unusually electronics-led, and it supplies NODE controllers designed to hold efficiency across a whole block of units.
That matters for servicing. A Heatweb unit is less likely to fail mechanically and more likely to present as a controls or sensor problem — a unit that works intermittently, modulates oddly, or reports a fault through its controller rather than simply stopping. Diagnosing one properly means reading the controller, not just stripping the hydraulics.
We service and repair electronic HIU ranges and NODE-controlled units, plus bespoke and modular Heatweb assemblies. If you are not sure which unit you have, send us a photo of the data plate and we will identify it.
What We Fix
- Controller and NODE unit fault diagnosis
- Temperature sensor failure causing erratic modulation
- Electronic actuator faults and valve position errors
- Intermittent hot water — controls cycling rather than mechanical failure
- Plate heat exchanger descaling and flow rate restoration
- Primary strainer cleaning and blockage removal
- Firmware and parameter checks against the building design
- Low delta T and return temperature investigation
- Full annual Heatweb HIU service with written report
Why Use a Specialist
Controls-First Diagnosis
We read the controller and fault history before touching the hydraulics — on an electronics-led unit that is where the answer usually is.
Intermittent Faults Welcome
The hardest Heatweb faults are the ones that come and go. Stored fault logs and live readings are how we pin them down.
Block-Wide Consistency
Where a whole block runs Heatweb units, we service to one standard and report on the block as a set.
Other brand HIU specialists: Danfoss HIU Repair · SAV HIU Repair · Switch2 HIU Repair · Caleffi HIU Repair · Alfa Laval HIU Repair · Thermal Integration HIU Repair · Redan HIU Repair
Heatweb HIU Service from £140
Annual service from £140 per unit. Repair callout from £140, covering attendance and full fault diagnosis — any repair fee is agreed with you before work begins. Multiple units in one block are quoted at a reduced rate.
Book a Heatweb HIU ServiceFrequently Asked Questions
What is a Heatweb NODE controller?
My Heatweb HIU works sometimes and not others — what is wrong?
Do you service bespoke Heatweb units?
How much does a Heatweb HIU service cost?
Heatweb HIU Fault? Call Us
Same-day Heatweb HIU repair and service across all 26 London boroughs.