potterton performa 30 he

[scoobymad]

I know this has come up before but I'm not too good with boilers I have hot water but no heating the boiler fires up for a few seconds when the heating is turned on but goes off again and the rads don't get hot any info grately appreciated I have a moany mothering law here help please

 

[twgas]

Have you checked the system pressure

 

[scoobymad]

Yes the pressure seemed a little high at 2.5 bar I released sum but it seems to just rise again

 

[twgas]

If the pressure rises when the boiler is off there must be a problem with either the filling loop not turning off or the HW heat exchanger passing from domestic to heating.

 

[scoobymad]

Is there anyway I can fix this myself

 

[namsag]

2 seperate faults rising pressure will not cause heating to play up .
Filter in the return isolating valve could be blocked or faulty sensor.

Do any fault lights flash

 

[scoobymad]

No fault lights flashing any ideas

 

[twgas]

2 seperate faults rising pressure will not cause heating to play up .

Agreed, however if the water is being replaced (leaking through prv due to overpressure) regularly then a build up of sludge is very likely and so cause the filter to block.

 

[scoobymad]

So what should I try and how