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Boiler advice

Short, plain guides to the problems and questions we are asked about most, written by a Gas Safe registered engineer.

• Low boiler pressure: causes and how to fix it
  What boiler pressure should be, why it drops, how to top it up safely and when to call a Gas Safe engineer.
• Boiler showing error code F1: what it means
  F1 usually means low water pressure. How to check, what to do and when a Gas Safe engineer is needed.
• How often should a boiler be serviced?
  Why gas boilers need an annual service, what it covers, how it affects your warranty and what landlords need.
• Landlord gas safety certificate (CP12): what you must do
  The annual gas safety check, who can do it, when tenants must get the record and how long to keep it.
• Combi, system or regular boiler: which is right?
  The difference between combi, system and regular boilers, and how to choose one for your home.
• Signs you need a new boiler
  How to tell when a boiler is worth replacing rather than repairing: age, breakdowns, efficiency and safety.
• Why is my boiler making a noise?
  Banging, whistling, gurgling and kettling in a boiler: common causes and when to call a Gas Safe engineer.
• Radiators cold at the top or the bottom: what it means
  Why radiators are cold at the top or the bottom, how to fix it, and when a powerflush is the answer.
• Carbon monoxide and gas safety at home
  Signs of a gas leak or carbon monoxide, what to do straight away and how to keep your home safe.
• Frozen condensate pipe: boiler stopped in cold weather
  Why a boiler stops in freezing weather, how to thaw the condensate pipe safely and when to call an engineer.