Most cold-tap mornings in Omagh come down to something small: boiler pressure that has slipped below about 1 bar, a timer knocked out of step by a power cut, a tripped switch on the fuse board, or an immersion heater nobody has flicked on. Work through the checks below before paying anyone. If you smell gas at any point, skip everything — leave the house and ring 0800 111 999 from outside. Still cold at the taps afterwards? Call 020 4577 2888 to reach a local plumber.
Smell gas? Different rules apply.
A gas smell is never a troubleshooting exercise. Leave the property now — no light switches, no doorbells, no flames, no hunting for the source. From outside, call the National Gas Emergency Number on 0800 111 999 and follow their instructions. Hot water can wait; this can't.
Is the boiler pressure sitting too low?
Look at the gauge on or near the boiler. On most sealed systems the needle should read roughly 1 to 1.5 bar when the system is cold — your boiler's manual gives the exact figure for your model. Below that range, plenty of boilers simply refuse to heat water at all. Many can be safely topped back up by the homeowner using the filling loop, done slowly with the manual open in front of you. If the needle keeps sinking again within days of a top-up, water is escaping somewhere in the system — that's a fault to have investigated, not a routine to live with.
Check 2Are the controls actually asking for hot water?
Before assuming a breakdown, check the boring things. Has the timer or programmer drifted after a power cut, so hot water is scheduled for hours you're not using? Is the thermostat or hot water control turned down further than you thought? And has the switch or fuse that feeds the boiler tripped at the consumer unit? From town-centre terraces in Omagh to homes out towards Dromore and Beragh, a real share of "no hot water" calls end with a reset clock or a flicked breaker and no bill at all.
Check 3Heating works but the taps run cold?
On a combi boiler this specific combination is a well-known clue. The diverter valve is the part that switches the boiler's output between the radiators and the taps, and when it sticks, one side carries on working while the other goes cold. Knowing this saves diagnostic time — say it when you call — but it is not a DIY repair. The valve lives inside the boiler, and the casing should only ever be opened by a Gas Safe registered engineer. There is nothing behind that panel a homeowner should be touching.
Check 4Got a hot water cylinder instead of a combi?
Homes with a cylinder — common in older properties around West Tyrone — usually have a backup most people forget: the immersion heater, an electric element in the cylinder with its own switch and often its own fuse. If the boiler side has failed, switching the immersion on can give you hot water tonight while a repair is arranged. If a hot tap sputters and spits air before running cold, an airlock in the pipework may be the culprit instead — worth mentioning on the phone, because it changes what the plumber brings.
Check 5Has a cold snap frozen the condensate pipe?
Condensing boilers drain water away through a condensate pipe, and where that pipe runs outside it can freeze in exactly the kind of cold spell West Tyrone's damp winters serve up — shutting the boiler down with a gurgle and a fault code. Pouring warm (not boiling) water along the frozen exposed section, then resetting the boiler, usually brings it back. If it happens every winter, ask about lagging or rerouting the pipe while a plumber is there anyway.
Still cold? Then it's an engineer's job
If the gauge, controls, immersion and condensate pipe have all come up clean, the fault is inside the boiler or deeper in the system — repeated lockouts, a failed diverter valve, or a leak dragging the pressure down. Call 020 4577 2888, describe what you've checked and any fault code showing, and you'll be connected with a local professional covering Omagh and the surrounding villages. The checks you've just done aren't wasted: they're the first questions any good plumber would ask.