🚨 Emergency Service
Emergency Boiler Repair in Kent and South East London — Same-Day Callouts
Gas Safe registered engineers. Local to Kent. Fixed prices before any work begins.
- You can smell gas
- Your carbon monoxide alarm is sounding
- You feel dizzy, nauseous, or confused and suspect carbon monoxide exposure
Open windows, leave the property, do not operate any electrical switches. Call the National Gas Emergency Service: 0800 111 999.
- No heating — boiler not responding
- No hot water from taps
- Boiler locked out with a fault code
- Boiler pressure dropped to zero
- Water leaking from the boiler
- Unusual noises — banging, kettling
- Pilot light repeatedly going out
- Frozen condensate pipe
Fast Local Response — Engineers Based in Northfleet
BoilerSense offers same-day emergency callouts across Kent and South East London. Our Gas Safe registered engineers are based locally — from our Northfleet base we can reach Gravesend, Dartford, Sidcup, Bexley, Woolwich, and Greenwich faster than engineers travelling from further away.
For most emergency calls received before midday, we can have an engineer with you the same day. When you call, you speak to someone who will listen to your description of the fault, advise on any immediate safety steps, and confirm when an engineer can attend. No automated queues. No call centre scripts.
01474 632 158 — Call Any TimeWhat to Do While Waiting for the Engineer
While you are waiting, there are a few steps you can safely take that may resolve the issue or provide useful information for our engineer.
Check the Pressure Gauge
Most modern boilers have a pressure gauge on the front. Normal operating pressure is between 1 and 1.5 bar. If below 1 bar, the system needs represurising. Your boiler manual shows how to repressurise using the filling loop — repressurise slowly to approximately 1.2 bar and attempt to reset. If pressure drops again quickly, there is a leak that requires investigation.
Try a Reset
If your boiler has locked out with a fault code displayed, pressing the reset button (usually a fire symbol or a key-shaped button) will attempt a restart. Some intermittent faults clear on reset. If the boiler fires and runs, monitor it. If it locks out again, make a note of the fault code and tell our engineer when they call.
Check Your Thermostat and Controls
A surprisingly common call-out cause is a thermostat that has been accidentally turned down, a programmer that has switched to off, or a smart thermostat that has lost its connection. Check that your thermostat is calling for heat and that your programmer is set correctly. If you have a Hive, Nest, or similar, check the app for any alerts.
Check the Condensate Pipe (Cold Weather)
If temperatures have been below freezing and your boiler has suddenly stopped, a frozen condensate pipe is a common culprit. Look for a white plastic pipe (21.5mm or 32mm) exiting the boiler to an outside drain. Pouring warm (not boiling) water over the external section may defrost it and allow the boiler to restart. Call us to advise on insulation to prevent recurrence.
How Our Emergency Response Works
A clear five-step process from your call to a fixed repair — with your approval at every stage.
You Call
Call 01474 632 158. Tell us your postcode, boiler make and model (if you know it), and what the boiler is or is not doing. We advise on any immediate safety steps and confirm our availability.
We Confirm Your Engineer
We tell you the estimated time of arrival. For morning calls, same-day attendance is our norm. Afternoon and evening calls — we give you an honest assessment and, where necessary, book a first-thing-next-morning attendance.
Engineer Arrives
Your BoilerSense engineer arrives with a comprehensive van stock of commonly required parts. They introduce themselves, confirm the problem, and carry out a systematic diagnosis.
Fixed-Price Quote Before Any Work
Before starting any repair, your engineer gives you a fixed price for the work required. You approve it before they proceed. No surprises. No escalating hourly rates.
Repair and Test
The majority of emergency repairs are completed in the same visit. After the repair, the engineer tests the full system — heating and hot water — and confirms everything is functioning correctly before leaving.
Common Emergency Boiler Faults We Fix
We carry common parts on our vehicles — diverter valves, pump heads, pressure relief valves, ignition components. The majority of these faults are same-visit fixes.
No Heating or Hot Water
The most common emergency call. Possible causes span a wide range — failed diverter valve, PCB fault, failed pump, or a motorised valve that has seized. We carry diverter valves for common combi models, pump heads, and PCBs for major brands. Most of these faults are same-visit fixes.
Boiler Locked Out — Fault Code
Modern boilers lock out and display a code when they detect a fault condition. The code tells a trained engineer where to look. Common emergency lockout causes include gas valve failure (F.28 on Vaillant, EA on Worcester Bosch), ignition electrode failure, or a safety device trip.
Boiler Pressure Loss
Sudden or rapid pressure loss indicates a leak somewhere in the system. May be a failed pressure relief valve (look for a trickle from a pipe exiting the wall), a pump seal failure, or a radiator valve weeping. Our engineers check the full system, not just the boiler unit.
Boiler Leaking Water
A leak from inside a boiler casing is usually a failed component — a pump seal, a heat exchanger joint, or a pressure relief valve discharging internally. These require immediate attention to prevent secondary damage to flooring or electrical components below.
Frozen Condensate Pipe
In temperatures below minus 3–5°C, condensate pipes on externally-routed sections can freeze solid, causing the boiler to lock out. Entirely preventable with pipe insulation — something we will address as part of any frozen condensate repair call.
Pilot Light Out / Ignition Failure
If your boiler attempts to light and immediately extinguishes — usually after a series of clicking sounds — the cause is typically a faulty ignition electrode, a worn ignition lead, or a flame sensor with accumulated residue. Straightforward parts replacements that our engineers carry in stock.
What Our Emergency Customers Say
"Called at 7am with no hot water and they had an engineer out by 10am. Fixed a faulty diverter valve and we had heating again by lunchtime. Brilliant service."
Google Review
"Our boiler kept losing pressure and two other companies couldn't find the fault. BoilerSense diagnosed a hairline crack in the heat exchanger within 30 minutes. The diagnosis was clear and the fix was done the same day."
Google Review
Emergency Repair Service Area
We cover the following areas for same-day emergency callouts. Our Northfleet base gives us fast access to the full service area.
DA11 · DA12
Northfleet — typically under 30 minutes
View coverage › DartfordDA1 · DA2
Including Crayford, Stone, Bean
View coverage › SidcupDA14 · DA15
Including Albany Park, Foots Cray
View coverage › BexleyDA5 · DA6 · DA7 · DA16
Bexleyheath, Welling, Erith
View coverage › WoolwichSE18
Including Plumstead, Thamesmead
View coverage › GreenwichSE10 · SE3
Including Blackheath, Charlton
View coverage ›Outside these areas? Call 01474 632 158 anyway — we may be able to assist.
No Heating or Hot Water? Call Now.
Lines open 7 days a week. Same-day attendance for most morning calls across our full service area.
01474 632 158For gas emergencies (smell of gas, carbon monoxide alarm), call 0800 111 999 first and leave the property immediately.