Emergency Boiler Repair in Gravesend (DA12)

The Valuation Office, counting the homes on the council tax list by when they went up, puts 5,500 of DA12’s 19,620 in the ten years from 1955 to 1964. That is 28% of the district, and more than twice any other period in the count. Those houses are past sixty now, and Ideal puts the typical life of a combi at ten to fifteen years, so a house from those years has outlived several boilers' worth of working life, and the one on its wall says nothing about the building’s age, or the other way round. That matters when water appears, because the questions a leak raises are about the boiler. A weeping joint on a young boiler and a heat exchanger giving way on an old one can look much the same from the floor, and they lead to very different conversations. The 2021 Census adds the other half of the picture. About three DA12 households in five own their home, outright or with a mortgage, so for most people here that conversation is theirs to have, and theirs to pay for. None of it changes the first ten minutes, which go the same way in the middle of town as out at Chalk, Shorne or Cobham.

Switch it off, catch the water, and ring.

Water from behind the casing

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Ideal’s guidance on a leaking boiler draws the line that matters here. Unless the drip is coming from the small pipe through the outside wall, which is the pressure relief valve and a different fault, water from a boiler with normal pressure on its gauge points to something inside it: a joint, a seal, the pump or the heat exchanger. You cannot see any of those with the casing on, and the water itself is a poor guide. It runs down and along the underside of whatever it meets, so the place it drips out of is not always the place it started, and a seal near the top can leave its puddle under the bottom corner. Inside the same box are the gas valve, the circuit board and the mains wiring, and a leak means the water has already reached somewhere it was never meant to be. That is why Worcester and Ideal both keep the casing for an engineer, and why Ideal’s advice to anyone standing in front of a leaking boiler ends plainly: do not attempt to fix anything yourself. What you can do from outside is read the display and the gauge, look underneath with a torch, and note where the water lands and how fast it comes. Those three things tell an engineer more before the visit than a panel taken off, peered behind and put back wrongly ever will.

The front panel stays on until an engineer takes it off.

If the fused spur that feeds the boiler and the wall round it are dry, switch the boiler off there. Put a bowl or a tray under the drip and move anything electrical off the worktop or floor beneath it. If water has already reached the spur, a socket or the cable under the boiler, leave them alone and switch that circuit off at the consumer unit instead, provided you can reach it without standing in water. Electrical Safety First gives the same rule for flooding. On a combi, switching off means no hot water as well as no heating, and that is the right trade until the leak is found.

Then ring, with the gauge reading to hand.

On a call like this the engineer makes the boiler safe first, gas, power and water, then takes the case off and dries the inside, so the wet trail can be followed back up to where it begins. After that it is a short list: a joint remade, a seal or the pump replaced, or a heat exchanger that has started to leak. The first three are ordinary repairs on most boilers. The last is different. On an older boiler, a leaking heat exchanger is where the honest answer can stop being a repair, and you hear that before anything is ordered.

If it is the heat exchanger on a boiler well into its second decade, we also arrange boiler installations, and the page behind that link sets out the job before you decide anything.