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  • No heat or hot water – potential causes include broken diaphragms and airlocks, failure of motorised valves, issues with the thermostat or low water levels.
  •  Leaking and dripping – a variety of issues could cause your boiler to leak water. It will depend on where the water is leaking from to determine the cause.
  •  Strange banging, whistling or gurgling noises – air trapped in the system is a common cause, alternatively it could be that the water pressure is too   low or it’s kittling.Check Automatic Fill Valve.
  •  Pilot light goes out – could be a broken thermocouple which is removing the gas supply to the pilot light, a draught blowing the pilot light out or a deposit built up in the pilot light. Call a certified boiler technician.
  •  Losing pressure – a water leak in the system is the most common reason for a loss of pressure. But it could also mean that the pressure relief valve needs replacing .Check Pressure Relief Valve for any water leak..
  •  Frozen condensate pipe – Thawing a frozen condensate pipe should ideally be done by a qualified certified technician
  •  Thermostat issues – if the thermostat is losing turning the heating on/off when its not supposed to it might be time to invest in a newer, more energy efficient one. Thermostat are not very expensive these days. You might consider a programmable or non-programmable Thermostat.
  •  Kettling – if you are hearing a strange rumbling noise? When lime scale builds up on your boiler’s heat exchange you get kettling. Failure of AFV can also cause kittling.
  •  Radiators not getting hot – Too much corrosion in pipework can cause sludge to gather in the system, preventing the free flow of hot water to the radiators. Chemically cleaning or flushing the system with approved cleaning agent will remove these deposits.
  •  Boiler keeps switching itself off – It could be low water pressure caused by leaking boiler or pipelines, or automatic fill valve failure. A problem with your  thermostat or a lack of water flow due to a closed valve, air or the pump not circulating the water in the system properly.