Expert PulsaCoil Water Heater Repair & Replacement in London

Posted on January 14, 2026 by Daniel Morosan

If you are experiencing issues with your water heating, you may have a Gledhill PulsaCoil system. Popular across London, these units are highly efficient but operate differently from traditional heating systems. Whether you have the PulsaCoil A Class, PulsaCoil 2000, PulsaCoil 3 (PulsaCoil A), or the original PulsaCoil model, professional maintenance is essential to keep your home running smoothly.

What is a PulsaCoil Thermal Store?

The primary difference between a PulsaCoil and a standard boiler is that it functions as a thermal store rather than a traditional hot water cylinder. While both contain a water tank, the PulsaCoil heats fresh tap water using a heat exchanger.

These systems are specifically designed to operate on “cheap rate” electricity tariffs, such as Economy 7. By heating the quantity of water you need during nighttime hours, PulsaCoil units allow you to significantly cut down on daytime electricity costs.

Common PulsaCoil Problems and Faults

Despite being a “great choice” for energy efficiency, these systems can face a variety of mechanical and electrical issues that require expert diagnosis. The most frequent symptom reported by homeowners is a “no hot water” issue.

Electrical and Sensor Failures

Because these units rely on complex electronics to manage timing and temperature, common faults include:

Sensor Failures: Faults with the hot water sensor, store sensor, or the Pump Speed Control (PSC).
Element Failure: Both standard and ‘Off Peak’ immersion heater elements can burn out.
Timing Issues: Failure of the External Economy Seven (EES) time clock or general electricity supply faults.
Wiring and Switches: Damage to cables or faults with the switched fused spur.

Mechanical Issues and Leaks

If your PulsaCoil boiler is leaking, it is often due to progressive corrosion that requires immediate attention to avoid a pipe burst. Professionals often find:

Rusted thermal storage tanks or rusted pipework.
Rusted thermostat pockets.
Water scale contamination within the coiled-pipe heat exchangers.
Depleted water levels within the thermal store itself.

Understanding the ‘Off Peak’ vs. ‘Booster’ Function

A common diagnostic sign of a fault is when the system fails in ‘Off Peak’ mode but works when the ‘booster’ is engaged. This typically indicates a specific problem with the off-peak supply, immersion thermostat, or associated cabling.

Your Essential Guide to Pulsacoil Water Heaters → Download (PDF)

Professional PulsaCoil Repair Services in London

Attempting to repair a thermal store yourself can be a daunting and dangerous experience. Electricity and complex plumbing are best left to experts to ensure the longevity of your unit.

Our Pricing and Process

At Storage Heater Repair, we offer transparent pricing and expert service:

Service Rate: £95 + VAT per hour.
Investigation: This rate covers up to one hour of labour, which may include a straightforward repair or a detailed investigation to provide an exact diagnosis for major repairs.
Parts: Some models require special parts that may not be standard stock; our investigation ensures we source the correct components for your specific model.

Why Choose Us?

No Callout Charge: We offer emergency services 24/7 with no callout fees.
Landlord Services: We can pre-arrange service calls directly with tenants for your convenience.
Eco-Friendly: We provide recycle and disposal services for old heaters.
Payment Options: We accept all major credit and debit cards.

Don’t let a minor fault turn into a major burst. If your PulsaCoil is showing signs of “weird behaviour,” contact a professional repair company immediately to extend the lifetime of your boiler.

Contact Storage Heater Repair today: Tel: 020 8728 9179 Email: info@storage-heater-repair.co.uk Website: https://storage-heater-repair.co.uk/

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