Boiler Breakdown Guide – Quick Fixes vs Professional Help

Problem

Try This Yourself

Call a Gas Safe Engineer When…

No heating or hot water Check power, thermostat, programmer, and pressure The system still won’t start, or pressure keeps dropping
Error/fault code showing Look it up in the manual or online Code won’t clear, or relates to gas/ignition faults
Pilot light gone out Relight following manufacturer’s instructions (older boilers only) It won’t stay lit, or flame is yellow/orange instead of blue
Frozen condensate pipe Pour warm (not boiling) water over the pipe, or use a hot water bottle Pipe keeps freezing, or boiler still won’t restart
Strange noises (banging/whistling) Bleed radiators to remove trapped air Noises continue, could indicate pump, valve, or heat exchanger issues

HomeService.Insure Safety Disclaimer

At HomeService.Insure, we encourage safe and sensible DIY, but your safety always comes first.

  • Only attempt basic checks and fixes if you feel confident.
  • Stop immediately if you notice burning smells, scorch marks, leaks, or anything that looks unsafe.
  • Never attempt electrical or gas repairs beyond simple resets or checks.
  • For complex, repeated, or potentially dangerous problems, always call a qualified Gas Safe engineer (for heating) or a certified electrician (for electrics).

By following this guidance, you reduce risks — but professional help should always be your first choice if there’s any doubt.

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