Harlequin HeatStream electric water heater repairs in London
Reliable 24/7 repair, servicing, and installation support for Harlequin HeatStream electric thermal stores. We deliver fast London call-outs to restore your mains-pressure hot water quickly and efficiently.
Harlequin HeatStream services and specifications
The Harlequin HeatStream Electric is an advanced open-vented hybrid thermal store delivering mains-pressurised hot water on demand. Learn how our specialised plumbing engineers keep your system running at peak performance across London.
Compact sizing
With a compact square footprint of just 520 x 520 mm, these units fit easily into standard airing cupboards and narrow London doorways in 150-litre and 210-litre capacities.
Energy efficiency
Boasting an ErP 'B' rating and ultra-low standing heat loss starting from approximately 1.12 kWh per day, ensuring dependable hot water with minimal electricity waste.
G3 regulation exempt
Because it operates as an open-vented thermal store, it does not require an expansion vessel, T&P relief valve, or G3 unvented discharge pipework under UK Part G regulations.
Urgent breakdown assistance across London
If you are facing an unexpected hot water emergency or system fault, please try calling our 24/7 hotline straight away. If we cannot answer immediately due to an active job, leave a voice message and our emergency team will get back to you without delay.
Why choose our specialist engineers
At Elson Coral Repair London 24/7, we understand the specific engineering behind thermal stores. Unlike standard hot water cylinders, the Harlequin HeatStream uses heat transfer technology without needing standard unvented discharge mechanisms. Our qualified technicians have deep hands-on expertise diagnosing immersion heaters, thermostats, and internal overflow or overfill configurations for both 150L and 210L models.
Fast diagnostics and lasting repairs
Whether your unit is suffering from lukewarm water, electrical tripping, or flow issues, we pinpoint the root cause on the first visit. We carry essential replacement parts across London so your mains-pressure hot water is restored safely and promptly with transparent pricing and no hidden fees.