What to Do If Your Boiler Pilot Light Keeps Going Out

A boiler pilot light that keeps going out is more than just an inconvenience, it can leave you without hot water or heating just when you need it most. If you’ve noticed your pilot light cutting out regularly, here’s what it could mean and what steps you should take next.

Why Your Boiler Pilot Light Keeps Going Out

The pilot light is a small flame that ignites the gas burner in your boiler. When it keeps going out, it usually signals a fault in the system. Sometimes it's a quick fix, but persistent issues often point to something that needs a professional’s attention.

A common cause is a faulty thermocouple, a safety device that shuts off the gas if the flame goes out. If it’s damaged or misaligned, it might cut the gas off even when the flame is still lit. Drafts, dirt buildup, or blocked vents can also affect the flame, while low gas pressure might cause it to extinguish altogether.

Troubleshooting Safely

Before doing anything, make sure your boiler is off and the area is well-ventilated. If you smell gas or feel unsure, call a Gas Safe registered engineer immediately. Otherwise, try these safe checks:

• Inspect the pilot light opening for dust or debris
• Relight the pilot light using the manufacturer’s instructions
• Check for obvious drafts near the boiler
• See if other gas appliances are working (to rule out a wider gas issue)

If the light won’t stay on or keeps going out shortly after relighting, it’s time to call a professional.

Don’t Ignore the Warning Signs

A pilot light that continually cuts out is a warning that something isn’t working as it should. Ignoring it could lead to a full boiler breakdown or even create a safety risk. Even if your boiler eventually restarts, recurring faults can lead to reduced efficiency and higher energy bills over time.

Modern boilers don’t always have visible pilot lights, so if you’re experiencing intermittent heat and your boiler uses electronic ignition, the issue may still be related. In these cases, a diagnostic check is essential.

Boiler Problems in Epsom, Sutton, Carshalton or Surrey?

RCB Plumbing Heating Renewables offers prompt boiler diagnostics and repairs to get your heating back on track. Serving Epsom, Sutton, Carshalton and the wider Surrey area, we’re here to help. Call us on 02082617499 or fill out our contact form to book a qualified engineer today.

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