Central Heating Repairs Cardiff & South Wales
Complete heating system repairs including radiators, thermostats, pumps, and valves. We diagnose and fix all heating system issues.
About This Service
A properly functioning central heating system is essential for comfort in your home. When problems occur—whether it's cold radiators, a faulty smart thermostat, or noisy pipes—you need a quick, professional repair service to get things working again.
At Apex Heating and Plumbing Solutions, our experienced engineers can diagnose and repair all types of central heating problems. From simple radiator bleeding and valve replacements to complex system wiring issues, we have the skills and equipment to identify faults and provide lasting solutions.
Common central heating problems include radiators not heating up properly (often caused by airlocks or sludge buildup), faulty thermostats or programmers, pump failures, and motorised valve issues. Our systematic approach to fault-finding ensures we identify the root cause, not just the symptoms.
We work on all types of heating systems including conventional, combination, and system boiler setups. Whether you have a modern smart heating system (like Hive or Nest) or an older gravity-fed system, we can help.
Common Problems We Fix
Cold Radiators
Caused by trapped air, sludge buildup, or faulty thermostatic radiator valves (TRVs). We balance, bleed, and repair to restore heat.
Faulty Motorised Valves
If you have hot water but no heating (or vice versa), the motorised diverter valve is likely stuck or burnt out. We carry replacements.
Broken Heating Pumps
A failed pump means hot water cannot circulate to your radiators. We supply and fit high-efficiency replacement pumps.
Smart Thermostat Issues
Communication errors between your wireless thermostat and the boiler receiver. We diagnose and rewire control systems.
What To Do If Your Radiators Are Cold
If some of your radiators are cold at the top, they likely have trapped air. You can try bleeding them using a radiator key. If they are cold at the bottom but hot at the top, this indicates a buildup of iron oxide sludge in the system.
If bleeding doesn't work, or if none of your radiators are getting hot despite the boiler firing up, you likely have a pump failure or a stuck motorised valve. Call our team for a professional diagnosis. If your system is heavily sludged, we may recommend Powerflushing to restore full heat.
Areas We Cover
We provide central heating repairs across Cardiff, serving communities from Roath and Canton to Rhiwbina and Whitchurch. We understand the mix of modern and period properties in the city and the specific heating challenges they present.
Our heating engineers also cover Newport, Swansea, and Bridgend. We carry a wide range of standard heating components, allowing us to fix most issues across South Wales on the very first visit.
Why Choose Us For Heating Repairs
With over 20 years of experience and a deep technical background, our understanding of heating system electricals and hydraulics is second to none. We can diagnose complex 'S-Plan' and 'Y-Plan' wiring faults that stump other plumbers.
Our safety-first approach ensures that any electrical or water-related repairs are carried out to the highest standards, protecting your home from water damage and electrical hazards.
Why Choose Us
Pricing Guide
Covers call-out and first hour of fault-finding
Quoted on-site before work begins
All prices are fixed. Contact us for a detailed quote.
Our Guarantees
Frequently Asked Questions
Central Heating Repairs Cardiff & South Wales Across South Wales
Our Gas Safe registered engineers provide professional central heating repairs cardiff & south wales services across the following areas and their surrounding communities:
No Heating? Leaking Pipe?
Our emergency engineers are ready to help, day or night.
Average response time: Under 2 hours for emergencies