Emergency Boiler Repair in Tooting

Published London guides put a boiler call-out at £40 to £90 and a minor fault at £80 to £220, with out-of-hours work at £120 to £220 on a weekday evening, £150 to £280 at weekends and £200 to £350 or more overnight. Those are ranges from other sources, not our quotes. The partner company gives you its own price in writing before it starts.

It depends on age, the fault and the part. Published London guides give a circuit board at £200 to £450, a heat exchanger at £350 to £650 and a new combi at £2,000 to £3,500. A major repair on an old boiler often loses to replacement, while a minor fix on a newer one rarely does. The company should put both numbers in front of you.

Hard water is a leading suspect. Tooting's supply is classed hard at 262 mg/l of calcium carbonate, which builds scale on the heat exchanger and in small passages, so the boiler overheats, kettles or loses hot-water flow. A descale, a scale reducer or a magnetic filter can slow the damage. The company will say whether scale is behind your fault.

Leave the property straight away, leave doors open, avoid switches and flames and ring the National Gas Emergency number on 0800 111 999 from outside. A gas escape is not something to diagnose yourself or to phone a plumber about first. Once the supply is declared safe, ring us on 07861 936716 and we will arrange the boiler work that follows.

On a combi, the usual causes are a failed diverter valve, a scaled heat exchanger or a pressure drop. On a system with a cylinder, it can be a stuck zone valve or a failed thermostat. Check the pressure gauge and any fault code and tell us what you see. The company can often fix these in a single visit with a published £80 to £280 part.

It is not usually dangerous, but it signals a leak or a failing expansion vessel and should not be ignored. Repeated top-ups hide the problem, add fresh oxygenated water and encourage corrosion. The company will trace where the water goes. If a hidden leak in the heating pipework is suspected, see our leak detection & repair page.

Yes, the line is answered at every hour, and we match the job to the partner company that can come out. Out-of-hours work costs more, as published guides show, so we will tell you honestly if a safe workaround means waiting for daylight. If you are without heat in freezing weather with vulnerable people at home, we treat it as urgent.

The partner companies cover most mainstream makes, and we match the make and fault where we can. Very old boilers may have parts that are no longer made, and the company will say so rather than promise a repair it cannot complete. Tell us the make and model when you ring, and we will find the company best placed.

Gas work follows the Gas Safety (Installation and Use) Regulations 1998 and the manufacturer's instructions, and a new boiler must meet the efficiency requirements of Building Regulations Part L. Heating and hot water pipework falls under Part G where relevant. The written quote should say what is being done, so you can ask questions before agreeing.

Often it is, especially in older houses where radiators are cold at the bottom. Published guides put a power flush at £300 to £700, and sludge can damage a new boiler quickly. Our power flushing page explains when it helps and when it does not, and the company should tell you honestly whether your system needs it.

It reduces the odds, particularly in hard-water areas like Tooting, because a service checks the heat exchanger, flue, pressure and safety devices. Published London guides put an annual service at £70 to £120. It will not guarantee a boiler never fails, but it is the cheapest way to catch scale and worn parts before a winter night.

Yes. We cover Tooting, Tooting Bec, Balham, Furzedown, Upper Tooting and Wandsworth Common, across SW17, SW12 and SW16. We match the nearest suitable heating company to your fault, text you its name before it arrives and make sure the quote is written down. If the boiler problem seems to be a wider water emergency, see emergency plumbing.