Central Heating

Potterton Promax Boiler banging and pressure gauge indicator jumping

Anonymous user 16/03/2024 - 2.39 PM

I’ve been having issues with my boiler since November due to an incredibly loud banging and clunking noise lasting around 1-2 minutes each time, during which the indicator within the pressure gauge bounces around. As I live in a Housing Association Property, I have had their contractors out numerous who have replaced the heat exchanger, a thermistor, the heat & hot water valves and tightened all the casings. They are now saying as they can’t find any fault with it, they can’t do anything by about it unless I have a lot of evidence of the noise. I have already given them a video and an audio recording but they have said this isn’t enough as it’s not a noise they have been able to induce. It happens at random times, regularly waking us and my neighbour up. It lasts for around 1/2 minutes which doesn’t allow much time to get the video or audio recorder on my phone running before the noise stops. I’ve tried to arrange for an independent engineer to come but as soon as they find out it’s a housing association property, they refuse to even watch the video or listen to the audio recording. Please could anyone give some advice on what the issue might be. I am happy to provide the video if needed.

Viper plumbing & Heating

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Sutton Coldfield

possibly expansion vessel needs recharging or replacing if the bladder inside has split.this would cause pressure to rise and the banging would be the prv (pressure relief valve) releasing. just a thought.

Answered28 January 2021

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Anonymous user

My first thought was that it could be the heat exchanger but it looks as though that's been changed and not solved the problem. It could be an air lock in the system somewhere - I've seen something similar before and surprisingly, bleeding all the radiators seemed to cure it but I think that was a bit of a fluke! There could also be a build up of sludge and debris in the system which could be restricting the flow - powerflushing might cure this. Obviously these are only ideas having not seen the problem first hand. Hope that looks ok and good luck!

Answered28 January 2021

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Anonymous user

It seems a little strange that nobody has come up with a solution ? To me it sounds like a circulation problem , is the system clean , does it need a powerflush , what is the pump like , is there a suspect piece of pipework close to the boiler ??? That’s all I can suggest system wise , as for the boiler it seems you’ve had engineers check the obvious

Answered28 January 2021

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