Solar Thermal Repair & Hot Water Specialists in Leicester | Since 2007

Solar Thermal Repair, Servicing & Installation — East Midlands

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Plumb Solar is a specialist solar thermal engineer based near Leicester, serving homeowners and trade professionals across the East Midlands — including Nottingham, Northampton, Coventry and Peterborough. With over 18 years' hands-on experience repairing, servicing and installing solar hot water systems, we diagnose faults that most general plumbers and installers simply cannot. G3 certified and BPEC trained, we work on all makes and ages of solar thermal system — including many brands no longer supported by their original installer.

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Solar Thermal Repair & Fault Diagnosis

Expert fault-finding and repair for all makes of solar thermal hot water system. From a complete loss of hot water to intermittent faults and component failures, we identify the root cause quickly and fix it properly — across Leicester, Nottingham, Northampton, Coventry and the wider East Midlands.

Common solar thermal faults we repair:

• No hot water or poor performance

• Air-locked solar circuits

• Pump failures and noisy pumps

• Leaking pipework or fittings

• Controllers not working or displaying errors

• Overheating and stagnation problems

• Sensor faults

• Glycol/antifreeze degradation — testing and replacement

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Solar Hot Water System Servicing

A regular service keeps your solar thermal system running safely and efficiently, protecting your investment and extending its working life. Our full system check includes:

• System pressure testing and expansion vessel recharging

• Glycol concentration check and replacement if required

• Pump operation and flow rate checks

• Sensor and controller testing and optimisation

• Roof-side visual inspection of panels and pipework connections

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We carry out solar thermal servicing across Leicestershire, Nottinghamshire, Northamptonshire, Coventry and Peterborough.

 

Emergency Solar Thermal Breakdown Call-Out

If your solar hot water system has stopped working, we offer fast call-out for urgent faults affecting your hot water supply. With over 18 years' experience diagnosing complex solar thermal problems — including faults that generalist engineers have failed to resolve — we're often the last call you need to make.

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Support for Heat Pump Installers — Hybrid Solar Thermal Systems

Many heat pump installers contact Plumb Solar when a customer has an existing solar thermal system they cannot integrate or commission. We regularly work alongside ASHP installers to bring legacy solar systems back into service and ensure they operate correctly alongside modern heat pump and cylinder setups.

We can help with:

• Repairs and recommissioning of legacy solar thermal systems

• Integrating solar thermal with heat pumps and unvented cylinders

• G3-certified unvented cylinder work

• Low-temperature heating system design

• BPEC Air Source Heat Pump Trained, Grant G1 and Viessmann

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Unvented Cylinder Installation, Servicing & Repair (G3 Certified)

As G3-certified engineers, we install, service and repair unvented hot water cylinders for domestic properties across the East Midlands. Unvented systems must be installed and maintained by a qualified G3 engineer — we carry the necessary certification and experience to do this work correctly and safely.

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Solar Thermal System Upgrades & Optimisation

If your solar thermal system is underperforming, ageing components may be the cause. We carry out targeted upgrades to restore efficiency and reliability:

• Pump station replacement and upgrades

• Modern controller installation

• Replacement evacuated tubes or flat-plate collector panels

• Pipework insulation improvements

• Antifreeze refresh and system flush

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Solar Thermal Recommissioning & Seasonal Start-Up

If your system has been drained, left dormant, or needs a fresh start after a long shutdown, we carry out full recommissioning including:

• Drain and refill

• Glycol concentration check and recharge

• Pressure setting

• Controller setup and optimisation

• Full safety check

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Solar Thermal Leak Detection & Repair

We find and repair leaks throughout solar thermal systems — including pipework, pump stations, cylinder coils, roof connections, and flow and return lines. Solar thermal systems operate at higher temperatures and pressures than standard plumbing; accurate diagnosis requires specialist knowledge of how these systems work.

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New Solar Thermal Installation

We install small-scale domestic solar hot water systems using evacuated tube or flat-plate collectors, designed and specified to suit your property and hot water demand. Based near Leicester and covering the East Midlands, Plumb Solar has been installing solar thermal systems since 2007.

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Experience with All Major Solar Thermal Brands

Installing and repairing solar thermal systems since 2007, we have worked on virtually every type of solar hot water system — including many brands and products that are no longer manufactured or actively supported. If your system was installed by a company that has since closed, or uses equipment that other engineers won't touch, we can help.

Brands and systems we work on include:

Advanced Solar, AES, Affordable Solar Energy, Akvaterm, AMK, Atmos, Ariston, Alpha, Baxi, Barilla, Calpak, Consolar, ES Solar, Evolution, Filsol, Genersys, Gledhill, Glow-worm, Grant, Halstead, Heliocol, Imagination Solar, Intaeco, Intersol, Keston, Kingspan, Kloben, Megaflo, Navitron, Newark, Nu-Heat, OSO, Paradigma, Rayburn, Rayotec, REEC, Riomay, Ritter, RM Solar, Roth, Rotec, Schott, Simplee Solar, Solfex, Solarcentury, Solar Domestic Energy, Solarmax, Solarsave, Solarsol, Solar Focus, Solar Home Energy, Solar Twin, Solar UK, Sonnencraft, Spectrum Energy, Sunsystems, Suntech, Streibel, Solartechnik, Smart Energy, Skyreach, Schüco, Telford, Thermomax, TiSun, Totally Solar (Floyd Lewis), Ultimate Energy, Vaillant, Viessmann, Vokera, Viridian, Worcester Bosch

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Our Service Area

Based near Leicester (LE7), we cover the East Midlands and beyond:

• Leicester and Leicestershire

• Nottingham and Nottinghamshire

• Northampton and Northamptonshire

• Coventry and Warwickshire

• Peterborough and Cambridgeshire

• Birmingham and the West Midlands

• Specialist long-distance call-outs also considered