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Long standing problem requiring long explanation
I have an open system with an Appolo boiler and a thermocouple which includes the interuptor wires. The heating system has always been prone to the occasional loud bang and every now and then, say twice a year the pilot light would go out and not relight until we swapped the thermocouple.
At the moment I am replacing the thermocouple almost monthly and nobody can give me a satisfactory answer as to why. In the last twelve months I have had a new fan fitted, a new injector bray and a brand new pump. In the past the overheat cut off device has been replaced.
The pilot light ALWAYS goes out after a series of bangs. I bleed the radiators weekly but rarely get any air out although you often hear a trickling sound in the pipes as if they are not full. I have drained the system on a number of occasions and added sludge removers and limescale treatments (I live in Manchester which does not have much limescale in the system).
This weeks it's behaving oddly again. Now the boiler seems to be literally boiling. It switches itself off after about two minutes then fires up again moments later. It's as if the overheat cut off device is switching it off but I had always assumed that the cut off device sent a signal to the thermocouple and broke it.
Out of interest the hot water only cycle seems to be well behaved.
Can anyone help me solve this?
I have an open system with an Appolo boiler and a thermocouple which includes the interuptor wires. The heating system has always been prone to the occasional loud bang and every now and then, say twice a year the pilot light would go out and not relight until we swapped the thermocouple.
At the moment I am replacing the thermocouple almost monthly and nobody can give me a satisfactory answer as to why. In the last twelve months I have had a new fan fitted, a new injector bray and a brand new pump. In the past the overheat cut off device has been replaced.
The pilot light ALWAYS goes out after a series of bangs. I bleed the radiators weekly but rarely get any air out although you often hear a trickling sound in the pipes as if they are not full. I have drained the system on a number of occasions and added sludge removers and limescale treatments (I live in Manchester which does not have much limescale in the system).
This weeks it's behaving oddly again. Now the boiler seems to be literally boiling. It switches itself off after about two minutes then fires up again moments later. It's as if the overheat cut off device is switching it off but I had always assumed that the cut off device sent a signal to the thermocouple and broke it.
Out of interest the hot water only cycle seems to be well behaved.
Can anyone help me solve this?