Slow drip from Potterton Performa.

[chainsaw_masochist]

A friend has a Potterton Performa 30 HE which is leaking very slowly from the bottom left-hand side, just behind the selector switch. This has been evident for a couple of months and there is visible scale on the upper edge of the control panel (where it joins the boiler casing. There is a slightly reduced pressure reading (about 0.8bar) but everything appears to be working fine. Matey says it was serviced 7 or 8 months ago but is unable to obtain any telephone response from the company.

Any ideas as to what might require attention? Thanks in advance for any advice.

 

[Gasguru]

More than likely it's leaking from the hot water switch actuating pin.

Needs a DHW diaphragm kit. Replace the diaphragm and gland seal, clean the scale off the pin. Easy job.

Forget the previous servicing...got nothing to do with it.

 

[Agile]

Depending on the service history I would just replace the gland based on a five year diaphragm life.

For a DIYer, I would recommend just replacing the gland ( without dismantling the unit ) as if the diaphragm is not broken no point in fixing it.

Commercially if the diaphragm has reached over four years then I would recommend changing it. Below I would suggest to the customer they could wait until the next annual service!

Tony

 

[chainsaw_masochist]

Thanks for the very useful advice, chaps. I shall pass tihs info on.