Search results

Thanks. The MI states the latter of the two causes you quoted. There are two facts to specifically consider. The fault emerged suddenly (there was no gradual worsening or known event which caused it) and the first cycle i.e. when the boiler is cold, lasts longer than those following. I'm...

Yes a very good point. I must engage brain properly before jumping to conclusions next time.

I have done a search it appears that it indeed can happen. The MI only talks about the Cold Water Inlet Tap Filter. I presume the process of cleaning is the same?

I really am still scratching my head on this one. No issues with flow whatsoever which virtually eliminates blockages as the cause. Maybe what I mentioned previously is the next logical step?

OK I have done as suggested and changed the sensor, it was very straightforward, but unfortunately the cycling continues. Does anybody have any further suggestions?

Thanks this seems entirely plausible. The part has been ordered.

OK an update: Cleaned the DHW HE with 1:2 Spirits Of Salts and Water as suggested. All traces of oxide are gone from visible areas. HW is now kicking in when the control is set to HW only and the diverter pin engaging. No overflow into CH. HW flow in general also seems better. I...

I took out the DHW HE and gave it an hour soaking in a hot citric acid solution and agitated regularly. Unfortunately still the same, both CH and HW are cutting out after a minute or so when cold and then after less than 10 seconds thereafter. The other anomaly I have just noticed is the when...

A brief update... Changed the diaphragm and checked out the diverter. No obvious issues as it appears the pin from the diaphragm is properly engaging when the water is fired up. Unfortunately it still cuts out (both CH and DHW) every 30 seconds or so regardless. Should I go back to the...

This confirms that it's likely the diverter is shot as I was starting to suspect. When I drained the boiler the other day there didn't seem to be an inordinate amount of crud. All the workings of the combustion chamber were checked by the GS fitter I had round 3 months ago. Apart from a...

Good Evening This post is the conclusion to date of two gas fitter visits and an element of self help which have both failed to deal with matters satisfactorily. I have a Potterton Performa 24 which was playing all sorts of tricks and I had the PCB and a couple of microswitches replaced...