Trianco Boiler Repairs
Experienced Trianco Boiler Repairs specialists
Available 24 hours a day, 7 days a week
Insurance approved
All parts guaranteed for a year
Fully Gas Safe trained engineers
Trianco Boiler Repairs London
Gas Safe and OFTEC registered engineers • 24/7 call handling • London wide
Call Now: 0203 868 6251 | Request a Call Back
Tell us the fault indicator and model. We will advise the safest next step.
Common searches include Trianco boiler fault codes, Trianco red light flashing, Trianco lockout, Trianco EuroStar fault, Trianco no heating, and Trianco Aztec problems. If you can, tell us the model name from the data badge and any warning lights or display codes.
We cover Trianco boiler repairs in London, including oil boiler lockouts, no heating, no hot water, and burner faults. We also offer boiler servicing and boiler installation across London.
Quick Navigation
Safety First
Smell oil or fumes? Turn off the boiler at the controls. Open windows. Do not attempt to restart. Call an engineer.
CO alarm sounding? Open windows immediately. Leave the property. Call 999. Do not re-enter until cleared by emergency services.
Boiler leaking heavily? Turn off the boiler at the controls. If safe, turn off the water supply. Call an engineer.
For gas boilers: If you smell gas, turn off the gas supply at the meter if it is safe to do so. Open windows. Leave the property. Call the National Gas Emergency Service on 0800 111 999.
Quick Checks Before You Call
Before calling an engineer, these safe checks may resolve simple issues with your Trianco boiler.
Check the fuel supply
For oil boilers: Is there oil in the tank? Check the gauge. For electric boilers: Is the power supply on? Check the isolator switch and fuses.
Check the pressure gauge
Pressure should read around 1.0 to 1.5 bar when cold. If it is low, you may need to top up using the filling loop (location varies by installation).
Check the thermostat
Is the room thermostat set above current room temperature? Are the batteries working?
Check the timer or programmer
Is the heating scheduled to be on? Check the clock is set correctly.
Try a single reset (oil boilers)
If the burner has locked out, locate the reset button on the burner control box. Press once and wait. Do not press more than twice. If it locks out again, call an engineer.
Trianco Fault Indicators Explained
Trianco boilers use LED indicator lights rather than digital fault codes on most models. The meaning varies by model (EuroStar, Aztec, Greenflame). Use the table below as a quick guide only.
| Indicator / symptom |
Typical meaning |
Safest next step |
| Red LED on (steady) |
Burner lockout or fault detected. |
Do not keep resetting. Call an engineer. |
| Red LED flashing |
Open circuit or sensor fault. Boiler may still operate but needs attention. |
Call an engineer for diagnosis. |
| Amber LED flashing |
Temperature satisfied (Aztec electric models). Normal operation. |
No action needed unless heating is not working. |
| Burner lockout |
Oil burner failed to ignite or flame lost during operation. |
Try one reset (press reset button once). If it locks out again, call an engineer. |
| No lights / no power |
Power supply issue or fuse blown. |
Check the isolator switch and fuses. If power is present, call an engineer. |
| Symptom not listed |
Trianco indicators vary by model and fuel type. |
Call us with the model name and symptom and we will advise the safest next step. |
Most Searched Problems
Trianco oil boiler lockout
Burner lockout is common with oil boilers. May be caused by blocked nozzle, dirty photocell, air in the fuel line, or ignition electrode problems. Try one reset. If it locks out again within 30 seconds, call an engineer.
Trianco boiler losing pressure
Losing pressure repeatedly may indicate a leak in the system (radiators, pipework, or boiler components). An engineer can pressure test to find the source.
Trianco boiler no hot water
Check the hot water temperature setting. If heating works but hot water does not, the motorised valve or cylinder thermostat may be faulty. Call an engineer.
Trianco electric boiler not heating
Check the power supply and thermostat settings. The thermal cutout may have tripped. Try pressing the red reset button on the element. If it trips again, call an engineer.
Why Trianco Boilers Develop Faults
Age and wear
Boilers over 15 years old are more prone to component failure. Seals, valves and burner components degrade over time.
Lack of servicing
Oil boilers require annual servicing to keep the burner clean and efficient. Skipping services leads to carbon buildup, blocked nozzles, and premature failure.
Fuel quality
Contaminated or old heating oil can cause burner problems. Water or sludge in the tank can block filters and nozzles.
System sludge
Dirty system water circulates debris through the boiler. This clogs heat exchangers and damages pumps. A powerflush can help.
Trianco Models We Repair
Our engineers work on Trianco oil, electric, and solid fuel boilers including:
Oil boilers: EuroStar (50 to 125), EuroStar Combi, EuroStar Premier, EuroStar Condensing
Electric boilers: Aztec (6kW to 15kW), Aztec Plus
Solid fuel / biomass: Greenflame, TRG range (note: biomass service is limited)
Older models: Optima, Tristar, Contractor series
Trianco boilers are manufactured in Sheffield, England. If you are unsure of your model, check the data badge on the front or side of the boiler casing.
Repair or Replace
A repair usually makes sense if the boiler is under 15 years old and the fault is straightforward (burner nozzle, photocell, electrode, pump). However, repeated lockouts, major component failures (heat exchanger, burner motor), or difficulty sourcing parts may make replacement more cost-effective.
We can advise whether repair or replacement is the better option for your situation. If a new boiler is needed, we offer boiler installation with a range of manufacturers.
Annual Servicing
Annual servicing is essential for oil boilers to maintain efficiency and prevent breakdowns. We recommend servicing every 12 months. Book a service here.
Landlord Gas Safety Certificates
Landlords with gas appliances must have them checked annually by a Gas Safe registered engineer. We provide CP12 certificates for landlords across London.
Call Us
Call Now: 0203 868 6251
Lines are open 24 hours. Tell us the model and fault indicator. We will advise the safest next step and, if needed, send an engineer.
Request a Call Back | Back to Boiler Repairs
