Boiler Safety Checklist: Signs Your Boiler Needs Attention

Why Boiler Safety Matters

A faulty boiler can be dangerous. Carbon monoxide (CO) poisoning from boilers kills around 50 people in the UK each year and hospitalises many more. Regular servicing and knowing the warning signs can save lives.

The 10-Point Boiler Safety Checklist

1. Check the Flame Colour

Your boiler flame should be crisp and blue. If it's yellow, orange, or lazy-looking, this could indicate incomplete combustion and carbon monoxide production. Call a Gas Safe engineer immediately.

2. Look for Soot or Staining

Black marks or soot around your boiler, or staining on walls nearby, can indicate a combustion problem. This needs professional inspection.

3. Listen for Unusual Noises

Some boiler sounds to watch for:

• Banging or clunking - Could be kettling (limescale buildup)
• Whistling - Often indicates trapped air or low pressure
• Gurgling - Air in the system or frozen condensate pipe
• Humming - May indicate pump issues

4. Check for Leaks

Any water around your boiler needs attention. Even small leaks can indicate internal corrosion or failing seals.

5. Monitor Your Boiler Pressure

Most combi boilers should run at 1-1.5 bar. If pressure is constantly dropping, you may have a leak in the system.

6. Test Your Carbon Monoxide Alarm

You should have a CO alarm near your boiler and in bedrooms. Test it monthly and replace batteries annually.

7. Check the Ventilation

Boilers need adequate ventilation. Never block air vents or store items against your boiler.

8. Look at the Age

Boilers over 15 years old are less efficient and more prone to problems. Consider replacement for safety and savings.

9. Check Your Service History

When was your boiler last serviced? Annual servicing is essential for safety and efficiency.

10. Review Your Gas Safety Certificate

Landlords must have one. Homeowners should keep service records. This documents that a Gas Safe engineer has checked your appliances.

When to Call a Gas Safe Engineer

Call immediately if you notice:

• Yellow or orange flame instead of blue
• Soot or black marks around the boiler
• Boiler keeps switching off
• Pilot light won't stay lit
• Unusual smells when boiler is running
• Excessive condensation in the room
• Anyone in the house has CO symptoms (headaches, dizziness, nausea)

Annual Boiler Service: What's Included

A proper boiler service by a Gas Safe engineer includes:

Book Your Boiler Service

My Home Heroes engineers are Gas Safe registered (#547691) and service all boiler makes and models across North East England.

Related Guides