Central Heating — Merton
Central Heating Repairs in Merton
Gas Safe registered engineers covering central heating repairs, servicing and upgrades across Merton — Wimbledon, Mitcham, Morden, Raynes Park. From £80/hour. Zone valves, pumps, power flush, system balancing and full installations.
Diagnosis in Merton
Central Heating Problems We Diagnose
Heating not coming on
Check thermostat settings, time programmer and zone valve operation. If the boiler fires but heat doesn't reach radiators, the zone valve or pump has likely failed. Zone valves typically last 10-15 years — a common failure point in London properties.
Some rooms hot, others cold
System imbalance is very common in London Victorian terraces where pipework runs and radiator sizes haven't been recalculated since the original installation. We balance lockshield valves so every room reaches temperature without any radiator over- or under-performing.
High gas bills but poor heating
A sludged system makes the boiler work harder, burning more gas for less heat. A power flush and magnetic filter typically cuts heating bills by 15-25% and reduces boiler wear. We test efficiency before and after with flue gas analysis.
London system age: many London properties still have central heating systems installed in the 1980s or 1990s. Upgrading controls (adding TRVs, replacing programmers with smart thermostats) can improve comfort and cut bills without replacing the entire system.
Areas in Merton we cover
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Common questions
Central Heating Merton: frequently asked
Why is my central heating not working in Merton?
Common causes of central heating failure in Merton include a seized zone valve, failed pump, faulty thermostat, or programmer fault. We diagnose the exact cause same day across all Merton areas — Wimbledon, Mitcham, Morden, Raynes Park.
How much does central heating repair cost in Merton?
Central heating repairs in Merton start from £80/hour. Most repairs — zone valve replacement, pump swap, system balancing — come to £120-£350. A full power flush for a typical London property starts from £400. We cover all of Merton.
Can you install central heating in a property in Merton with no heating?
Yes — we carry out full central heating installations across Merton, including boiler, radiators, pipework and controls. A full installation in a standard Merton property typically takes 2-4 days. We cover Wimbledon, Mitcham, Morden, Raynes Park and all surrounding areas.
My central heating was fine last year — why isn't it working now in Merton?
Seasonal activation issues are very common across Merton. Zone valves and pumps can seize when left unused through summer, then fail to operate when heating is switched on in autumn. We free stuck zone valves and replace seized pumps across Merton — usually same day.