Is a Leaking Boiler Dangerous?

Quick Answer: A leaking boiler CAN be dangerous depending on where the leak is and what's leaking. Water leaks aren't immediately dangerous but can cause damage and lead to electrical hazards. Gas leaks are extremely dangerous - evacuate and call 0800 111 999.

Types of Boiler Leaks

Water Leaks

Danger level: Low to Medium

Common sources:

• Pressure relief valve (dripping outside)
• Pipe joints and fittings
• Heat exchanger (internal corrosion)
• Pump seal

Actions:

1. Turn off boiler
2. Place container under leak if possible
3. Book engineer within 24-48 hours
4. Don't use if large leak

Gas Leaks

Danger level: CRITICAL

Signs:

• Sulfur/rotten egg smell
• Hissing near boiler
• Dead houseplants
• Feeling unwell when home

Actions:

1. DON'T turn on/off any switches
2. Open windows
3. Leave property
4. Call Gas Emergency: 0800 111 999 from outside
5. Don't re-enter until cleared

When to Turn Off Your Boiler

Turn off immediately if:

• ❌ You smell gas
• ❌ Water is near electrical components
• ❌ Leak is significant (more than dripping)
• ❌ Boiler is making unusual noises
• ❌ You see error codes

Okay to wait for engineer if:

• ✅ Small drip from pipe joint
• ✅ Occasional drip from overflow outside
• ✅ No other symptoms

Glasgow Boiler Leak Repair Costs

Repair	Cost
Pipe joint fix	£65-£120
Pressure relief valve	£80-£150
Pump seal	£150-£250
Heat exchanger	£400-£700

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24/7 boiler emergencies: +44 141 468 9930