Thermal Integration Specialists · All London
Thermal Integration HIU Repair & Service
Same-day Thermal Integration HIU callouts across Greater London. Service from £140, repair callout from £140 covering attendance and full fault diagnosis.
About Thermal Integration HIUs
Thermal Integration is a British HIU manufacturer and one of the established names in the UK market. It builds the intelligent HIU ranges supplied under several brand partnerships, and its units are widely specified in London residential developments.
Thermal Integration units sit in the intelligent category — they modulate based on sensor input rather than running fixed open or closed. The practical consequence is that a fault often shows up as degraded performance rather than a clean failure: hot water that takes longer to arrive, a heating circuit that never quite gets there, or consumption that creeps up without an obvious cause.
We service and repair intelligent and modulating HIU ranges, including units supplied through Thermal Integration’s brand partnerships. 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
- Intelligent control board fault diagnosis and parameter checks
- Modulating valve and actuator replacement
- Hot water delay and poor temperature stability
- Plate heat exchanger descaling and flow rate restoration
- Primary strainer cleaning and blockage removal
- Temperature sensor replacement and recalibration
- Return temperature limiter setup and commissioning correction
- Low delta T investigation on modulating units
- Full annual Thermal Integration HIU service with written report
Why Use a Specialist
Commissioning Checked
Many modulating unit complaints trace back to commissioning parameters that were never set correctly. We check them, not just the hardware.
Performance Measured
Hot water delivery time, flow rate and delta T recorded, so degraded performance is evidenced rather than argued about.
Transparent Pricing
Callout from £140 covering attendance and diagnosis. Any repair fee agreed before work starts.
Other brand HIU specialists: Danfoss HIU Repair · SAV HIU Repair · Switch2 HIU Repair · Caleffi HIU Repair · Alfa Laval HIU Repair · Heatweb HIU Repair · Redan HIU Repair
Thermal Integration 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 Thermal Integration HIU ServiceFrequently Asked Questions
What does an intelligent HIU actually do differently?
My hot water takes a long time to come through — is that a fault?
Can a badly commissioned HIU be corrected later?
How much does a Thermal Integration HIU service cost?
Thermal Integration HIU Fault? Call Us
Same-day Thermal Integration HIU repair and service across all 26 London boroughs.