Banging and steam from a Potterton Puma 80

[RAK]

I hope someone can help.

The pressure regularly drops below 1 bar and the system locks out, this is cure by opening the valve and increasing the pressure but does anyone know why this is happening (it is more often during cold weather if this has any bearing on matters).

Yesterday the heating was due to come on early morning but the pressure had dropped and the system locked out, when tit was reset, there was a banging from the system and then steam started pouring out the top. The system would not re-ignight the pilot.

I turned off the system for the day and in the evening the system fired up again, but strange noise are still coming from the unit.

Any ideas, or do I need to have the system looked at by a professional?

Thanks

 

[DP]

I would not be surprised if the boiler has been killed.

You do not run the boiler on low pressure. Steam that you saw pouring from top of the boiler could have damaged components within the boiler resulting in noisy operation.

Right thing to do now is seek out a GOOD HEATING engineer.

 

[ChrisR]

To be fair the boiler has a low pressure switch so shouldn't have started up. But these often stick in low pressure mode - perhaps yours has stuck in high pressure mode so the boiler thinks it has water in it.

You have a leak. Don't try to use the boiler until, as DP says,....