A boiler mostly fails when it is working hardest, which up here means the darkest, coldest week of the year. Most of the common failures have a calm first step you can take yourself — and one of them, gas, has a rule that outranks everything else on this page.
No heat or hot water right now? Check the pressure gauge, check the thermostat and any timer, and — in freezing weather — suspect the condensate pipe before anything else. If it is beyond a reset, ring 020 4577 2888 any hour to be connected with a local plumber. If you smell gas, skip all of that: leave the property and call 0800 111 999.
If you smell gas, the boiler stops being a plumbing question. Take everyone outside straight away. Do not touch light switches on or off, do not use anything with a flame or a spark, and do not go hunting for the source. From outside the building, call the National Gas Emergency Service on 0800 111 999 and follow their instructions. Only after they have made things safe is it time to talk about engineers and repairs.
The kindest thing you can do for a January morning is spend ten minutes with the boiler in October. Run the heating once before the cold truly sets in, so a fault shows itself while the evenings are still forgiving. Find the pressure gauge and learn its resting figure. Bleed any radiator that is warm at the bottom and cold at the top. And follow the little plastic condensate pipe from the boiler to wherever it drains — if it runs outside, that is the pipe most likely to stop your heating in a cold snap, and lagging it now is a small job with an outsized reward. If the boiler is due its annual service, autumn is the season for it, before the diary of every engineer in Moray fills up.
December – February · Pressure, in plain termsMost sealed-system boilers sit happily at around 1 to 1.5 bar when cold — your own manual gives the exact range. Below roughly 1 bar, the boiler may struggle or refuse to run; topping up once through the filling loop is normally a job a householder can do, following the manual. The figure to respect is the trend: a system that needs topping up again within days has a leak somewhere — a weeping radiator valve, a joint under a floor — and wants a plumber to trace it rather than a hand on the filling loop every weekend. High pressure matters too: a needle up at 2.5 to 3 bar, or a relief pipe dripping outside, is a fault to mention when you ring, not something to ignore because the heating still runs.
December – February · The frozen condensate pipeWhen a hard frost settles over Moray and a boiler locks out overnight with a fault code, the little condensate pipe is the first suspect. It carries slightly acidic condensation from the boiler to a drain, it is usually plastic, and where it runs outside — down a back wall, into a gully — it can freeze solid in exactly the weather when the boiler is working hardest. The remedy is often gentle: pour warm, never boiling, water along the frozen section, or hold a warm cloth on it, then reset the boiler as the manual describes. If it comes back to life, consider the episode a warning and have the pipe lagged or re-routed before the next freeze. If it will not reset, or the same code returns, that is the moment to ring.
Any season · Knowing whose job is whoseThe dividing lines are worth knowing before trouble arrives. System pressure, radiators, leaks from pipework, cylinders and tanks — that is plumbing work. Anything on the gas side of the boiler is legally restricted to engineers on the Gas Safe Register, and asking to see a Gas Safe ID card before gas work begins is not rude, it is the system working as intended. And a suspected gas leak belongs to nobody's diary at all: it goes to the National Gas Emergency Service on 0800 111 999, from outside the building, before any other call is made. When you ring the number on this page, describe the fault honestly and you will get an honest steer on which of the three you need.
Usually, yes. Most sealed systems have a filling loop, and the boiler's manual shows how to bring the gauge back to around 1 to 1.5 bar when cold. Top it up once and watch it. If the needle keeps sliding down over the following days, there is a leak somewhere in the system, and it needs finding rather than endless topping up.
A very common winter culprit is a frozen condensate pipe — the small plastic pipe that carries condensation from the boiler to a drain, often running outside. Many boilers shut down with a fault code when it blocks with ice. Thawing that pipe gently with warm, not boiling, water and then resetting the boiler often brings everything back. If it will not reset, ring for help.
Get everyone out of the property, do not touch light switches or anything that makes a flame or spark, and do not go looking for the leak. From outside, call the National Gas Emergency Service on 0800 111 999. Repairs come later, once the emergency service has made things safe — a plumbing line is the wrong first call for gas.
In the UK, anyone working on the gas side of a boiler must be on the Gas Safe Register, and it is entirely fair to ask to see an engineer's Gas Safe ID before gas work begins. A plumber can deal with system pressure, radiators, leaks and pipework, but work on gas itself is legally restricted to registered engineers.
The front page — the Moray plumbing year and how this line works.
Back to the front →Frost, thaw and the first five minutes when water is escaping.
Read the chapter →What to try, what never to pour away, and when it is the public sewer.
Read the chapter →No invented prices — how charging works and what to ask before work begins.
Read the chapter →Pressure, timers, tripped switches and the diverter-valve clue — calm checks first.
Read the chapter →Lagging in autumn, gentle thawing in winter — and the flame rule with no exceptions.
Read the chapter →Damp patches, dropping pressure and the quiet stopcock test that settles it.
Read the chapter →Ring any hour of any season to be connected with a local plumber covering Elgin and the Moray villages around it — and remember: for gas, it is 0800 111 999 first.
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