Still keepin' the auld 28 going but it's getting noisy when heating the central system; quiet, almost silent when heating water. I suspect the pump is on the way out. Any suggestions on how I check? Would be much obliged for any input.
Is the thinking that the diverter value is not allowing enough flow through the central heating system?when was the diverter valve last serviced ?
The noise is continuous with the CH being on, turn on a tap and its stops, turn off the tap and it starts. Switch to HW only and its stops. The frequency of the noise is also constant.no if everything is working OK you have done it right, not really a hard job, when you say the boiler is kettling is it just for a min or so and settles down or does it do it for a while ? does the boiler modulate to low flame or go off and then come back on ?
Doesn't sound like a high-pitched screeching more like a pan of water boiling. Could I try uploading a file of the sound?sorry just came to me, when you serviced the diverter valve did you change the shuttle assembly ? when you say kettling do you mean a high pitched screetching , kettling is exactly that sounds like a kettle boiling
Yes do that but it sounds like you have got it wrong with the diverter valve shuttle replacement, if you only used part of the kit or got the two O rings mixed that would cause it
think you have got the diverter valve service wrong
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