Is your Worcester boiler displaying fault code 260? Don’t panic – you’re not alone. This is one of the most common fault codes reported by Worcester boiler owners, and in many cases, it can be resolved quickly without expensive repairs.
Fault code 260 indicates: The flow temperature sensor is not detecting a rise in temperature following a burner start. This comprehensive guide walks you through everything you need to know about this error, from understanding what causes it to step-by-step solutions you can try yourself, plus when it’s essential to call a Gas Safe registered engineer.
Whether you’re a hands-on DIY enthusiast or simply want to understand the issue before contacting a professional, this guide provides clear, actionable advice to get your heating system back up and running safely.
In This Guide
At a Glance
Key Takeaways
- Fault code 260 means: The flow temperature sensor is not detecting a rise in temperature following a burner start
- This fault causes your boiler to shut down as a safety precaution to prevent damage or unsafe operation
- Some causes can be resolved with simple DIY fixes like repressurising or resetting your boiler
- Other causes require professional diagnosis and repair by a Gas Safe registered engineer
- Never ignore this fault code – addressing it promptly prevents more serious and costly problems
- Regular boiler servicing can prevent many fault codes from occurring in the first place
What Causes Worcester Fault Code 260?
Understanding what triggers fault code 260 is the first step toward resolving it. Based on the fault description “The flow temperature sensor is not detecting a rise in temperature following a burner start”, here are the most common underlying causes:
1 Temperature Sensor Fault
Modern boilers use temperature sensors (NTC thermistors) to monitor water temperature. These can fail due to:
- Sensor reaching end of life
- Wiring connection issues
- Corrosion or moisture damage
- Sensor not properly clipped to pipe
2 Circulation Pump Problems
The pump circulates hot water through your heating system:
- Seized pump (common after summer shutdown)
- Pump speed set incorrectly
- Airlocks preventing water circulation
- Blockages in the system
- Pump electrical connection fault
3 Other Contributing Factors
Additional issues that can trigger this fault code:
- Recent power cut or boiler reset
- Extreme weather conditions
- System modifications or repairs
- Age and wear of boiler components
- Poor installation or maintenance history
How to Fix Worcester Fault Code 260
Before calling an engineer, try these troubleshooting steps. Important: Only attempt fixes you feel comfortable with. If unsure, contact a Gas Safe registered engineer.
1 Check Sensor Connections
Visual check only – do not disassemble:
- Turn off the boiler and let it cool down
- Check if any visible wires near the sensor are loose or disconnected
- Look for signs of water damage or corrosion near the sensor area
- If anything looks damaged or disconnected, call a Gas Safe engineer
2 Reset Your Boiler
You can try this yourself:
- Locate the reset button (usually marked with a flame symbol)
- Press and hold for 2–3 seconds
- Release and wait for the boiler to restart
- Important: Only reset ONCE. If the fault returns, do not keep resetting – call an engineer
Still Having Issues?
If the fault code returns after trying these steps, or you’re not comfortable attempting DIY fixes, it’s time to call a professional.
Gas Safe registered engineers • Same-day emergency callouts • Serving across Kent
When You MUST Call a Gas Safe Engineer
Some causes of fault code 260 require professional diagnosis and repair. Never attempt these repairs yourself:
Do NOT Attempt DIY For:
- Gas valve faults or replacements
- Ignition electrode or spark generator replacement
- Fan motor or air pressure switch issues
- PCB (printed circuit board) faults
- Heat exchanger problems
- Pump replacement or electrical work
- Sensor replacement or wiring repairs
- Flue system work
- Any work involving gas connections
- Any fault you’re unsure about
Why use a Gas Safe registered engineer?
- Legal requirement for gas work in the UK
- Proper diagnostic equipment to identify the exact fault
- Access to genuine manufacturer parts
- Work is guaranteed and insured
- Maintains your boiler warranty
- Ensures safe operation for your family
Preventing Future Worcester Fault Codes
Regular maintenance is the best way to prevent fault codes and extend your boiler’s lifespan:
Annual Boiler Service
Book a service every 12 months with a Gas Safe registered engineer. A service includes full safety checks, combustion analysis, component inspection and cleaning, flue gas testing, pressure testing, filter cleaning, and fault code history review. An annual service prevents the vast majority of common faults, maintains your warranty, and keeps efficiency high – saving you money on your energy bills.
Insulate Your Condensate Pipe
If your boiler has an external condensate pipe, have it insulated. This simple investment prevents winter breakdowns caused by frozen pipes – and can save you the cost of an emergency callout.
Monitor System Pressure
Check your boiler pressure gauge monthly. It should be 1.0–1.5 bar when cold. If it drops regularly, you may have a small leak that needs addressing.
Bleed Radiators Correctly
When bleeding radiators, always check and top up boiler pressure afterward. Many pressure faults occur because homeowners bleed radiators but forget to repressurise.
Keep Vents Clear
Ensure air vents and flue terminals are clear of obstructions. Don’t block boiler vents with storage or furniture.
Frequently Asked Questions
Fault code 260 indicates: The flow temperature sensor is not detecting a rise in temperature following a burner start. This means your boiler has detected a problem and shut down as a safety precaution. The boiler will not operate until the underlying issue is resolved and the fault is cleared.
It depends on the cause. Some issues like low pressure or a frozen condensate pipe can be resolved with DIY fixes. However, problems involving gas components, electrical parts, sensors, or the fan require a Gas Safe registered engineer. When in doubt, always call a professional – incorrect DIY repairs can be dangerous and invalidate your warranty.
A Gas Safe registered engineer will diagnose the exact issue and advise whether a repair or replacement is needed. They have specialist testing equipment that can pinpoint the problem accurately. In many cases a simple repair is all that’s needed, but your engineer will explain all options and let you decide.
If fault code 260 returns repeatedly after resets or attempted fixes, there’s an underlying problem that hasn’t been properly diagnosed. Common reasons include a leak causing pressure loss, an intermittent electrical connection, a component at end of life, system blockage or sludge buildup, or an incorrect previous repair. Do not keep resetting – persistent faults require professional diagnosis.
No. Your boiler will not operate when this fault code is active – it’s locked out as a safety precaution. Do not attempt to bypass safety features or force the boiler to run. Resolve the fault properly, either through DIY fixes (if appropriate) or by calling a Gas Safe engineer.
Most common faults can be diagnosed and repaired on the same visit, often within a couple of hours. Simple fixes like repressurising or resetting take just minutes. More involved repairs may take longer, but your engineer will give you an honest assessment of the timescale before starting any work.
Related Worcester Fault Codes
If you’re experiencing other issues with your Worcester boiler, these related fault codes might help:
Fault Code A1
Water is leaking or the pump needs replacing or freeing due to the pump running dry.
Fault Code A7
The hot water negative thermistor coefficient (NTC) sensor is defective – the hot water sensor or co…
Fault Code A8
Break communication to FX sensor controls electrical connections need checking.
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