LONDON'S HIU SPECIALISTS
HIU Repair London — Same-Day Heat Interface Unit Repairs
Lost hot water or heating? HIU Experts provides same-day HIU repair across London. Our specialist engineers diagnose and fix the actual fault first time — no guesswork, no unnecessary upselling.
HIU repair in London is diagnosed and quoted transparently before any work begins. HIU Experts is a Gas Safe registered Heat Interface Unit specialist covering all of London, with same-day emergency callouts and a first-visit fix on most HIU faults.
PICV valve diagnosis and replacement
Failed actuator replacement
Leaking union and connection fixes
Plate heat exchanger descale or replacement
Control valve and diverter valve repair
Control board / sensor fault diagnosis and reset
When Your HIU Fails, Everything Stops
A broken HIU means no hot water, no heating, and a stressful day for residents. General plumbers often can't diagnose HIU faults properly they don't carry the right spares and aren't trained on the control systems. That's why an HIU specialist should be your first call, not your last.
No hot water or heating
Fault codes or flashing alarm lights
Banging, clicking or whistling noises
Lukewarm water at max setting
Leaks or dripping from the unit
Low or fluctuating flow temperatures
The Benefits
Specialist response, accurate diagnosis and clear repair decisions.
SAME-DAY RESPONSE
Emergency callouts across London — we aim to reach you the same day you call.
FIRST-VISIT FIX RATE
We carry common HIU parts on the van, so most repairs are resolved in one visit.
PARTS WARRANTY
All parts we supply and fit are guaranteed ask your engineer for details.
TRANSPARENT PRICING
You'll know the cost before any work proceeds. No hidden call-out surprises.
HELPFUL ANSWERS
Frequently Asked Questions About HIU Systems
- 01
- 02
- 03
- 04