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Tony Problem getting to flow return pipes on DHW HE, need to try again from below. But I do have another symptom. My overflow is dripping - Pressure had dropped so low and I just had to 'pressure up' in order to get boiler to fire up again. Does this fit with the blocked DHW HE diagnosis...

Hi Tony. Pleased you are still about. Ill give it a go - sounds good. I have no issues with a boiler replacement, this owes me nothing after nearly 10 years, but I actually like it. It has been a good and faithful servant !! Steve

HI again all. I have had some great support from this site in the past so here's hoping all the good guys are still around (Tony Agile etc !!) MY thermo shower (Grohe) has recently been delivering varying temperature HW, going from hot to cold and back within seconds. At first suspected...

Tony just an update Did full drain, flush and refill with new inhibitor over summer. Pressured up to 'red light' and it has stayed there for at least 6 weeks now. Regards SjH

Tony Thankx Steve

Tony Just an update - all seems fine with no issues, thanks to you I say. Did have a minor prob with pressure but think I tend to pressure just until middle green LED comes on, rather than a particular time beyond. Problem is, I dont know where the pressure is between min and max with the...

Thanks Tony I'll keep in touch. Regards Steve

Tony The APS is a square one inside the chamber and the test point cap is in place and secure. Steve

Tony Just a quick update in appreciation of your help in the past. I have left the Risc at about half setting and all works fine from a DHW and CH point of view. On the odd occasion over the past 2 weeks or so, on cold days when I have upped the CH control to half (or above) I have...

Tony I may have spoken too soon in my post earlier today. I took a look at the boiler at 1015 this morning as the heating had gone off. I noticed that the Lock-Out had activated and the big red lamp was on. Despite resetting several times, the boiler would not fire (no ignition sparks)...

Tony All working fine over Christmas period. I did reduce the risc to half and it has worked fine at not more than 1/2 CH setting despite -6 degrees outside. My rads total about 15 KW whcih suggests that the 1/2 risc setting matches the right point on the graph curve in the installation...

Tony Thanks for taking the trouble. Steve

Tony All done and 48 hours to go ! Stripped the diverter, cleaned all bits, shuttle etc, greased and re-assembled. Seems to be working perfectly ( now that the weather has got warmer....!!) Set CH stat on an eighth today and too warm ! Then again outside temp is 10+ The right hand...

Tont Second post We (You !) are on the right track here I suggest. This morning all going fine (no big showers as yet) BUT the right hand DH pin has retracted much further and is much closer to the body of the diverter valve. So it certainly is sticking. I will carry on with your...

Tony .....You are my hero by the way............... I understand all you say. I've just had a glass of wine, so may wait till tomorrow to do the necessary. But, all makes sense. Fortunately the weather is mild. I would guess the DHW pin extracts about 4mm from full on (about the size...

Tony Interesting stuff. On the diverter valve, the 'main circuit flow switch' is on when the pump is, ie all the time, which makes sense as I guess thats whats it there to monitor. The DHW flow switch activating rod fully depresses the microswitch with DHW flow, BUT, when the DHW is...

Tony Reduced the Risc from max to half, but heating just died with virtually cold rads, so put back to original max setting. Let me give today's summary! It is becoming quite typical. 1. Boiler came on at 0630 (CH Therm set to half) - heated up fine 2. Couple of quick showers by...

Tony Thanks yet again! 1. dips as you suggest - all at 'spindle side 2. 13 rads, mostly 72 X 24, but three 36 X 24 or less. No recent changes. 3. Will try the gas valve/ flame size and report back ! Steve

Tony Agile Glazier Again thanks for your comments - I have checked items and pot spindles are correctly 'aligned' and the four dip switched are all on. Incidentally, I noticed on one of your previous replies to another problem, that you regerred to the Riac. pot. On my boiler this is set...

Agile Great Points ! Been reading the manual and dont expect any probs to check your points - I will report back - Thanks again. SBobs