Measured fault isolation
Conclusive diagnosis requires an engineer on site to measure temperatures, pressures, flow, electrical supply and control response under operating conditions.
HIU diagnostics
THE FAULT IS NOT ALWAYS WHERE THE SYMPTOM APPEARS.
No heating, no hot water and unstable temperatures can originate in different parts of the same connected system.
Request diagnostic attendance
HIU TECH / TECHNICAL SCOPE01—03
Network or dwelling
Primary availability, differential pressure and return temperature are considered alongside the HIU's valves, sensors, controller, pump and secondary circuits.
A clear technical outcome
Attendance concludes with recorded observations and a defined next action, rather than speculative component replacement.
PRIMARY 70.2°CRETURN 41.8°CΔT 28.4KFLOW 11.6 L/MIN
Measure. Diagnose. Resolve.