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Hi guys, me again. Thanks for all of the above - I've now hit the thanks button (hadn't seen it before!), I did appreciate it before though...great site! Anyway the Wallstar - a little update; - I had the local oil pro around the other day to service it. He set up the pressure & air settings...

Thnx guys- I used to be in Bristol...now norfolk! Will look at the electrode position. I cant actually see a NRV....only a fire valve which is at ground level a few feet from the burner...

Hi again all, I've deliberately resurrected this thread as my boiler woes have returned. For the last few weeks the Wallstar has been locking out - usually overnight. I was naughty and fiddled a bit with the air & oil pressure settings, (yes, without an analyser). Anyway, even after tweaking...

Cheers guys Fitted the coil, boiler appears to be running fine now :) Thanks very much

Just picked up a new pump (with new solenoid) since they had one in stock at my local. Will fit this afternoon and report back. Cheers for the test procedure, wil run that just beforehand. Tom

Ok cheers ill try and get one in town today and a new nozzle while im at it. P.s- could this be caused by a central heating prob inside the house? ....i.e a blocked pipe, or inefective pump for example?

When its running, there is a single air bubble sitting at te high point in the line no stream of bubbles, I think the feed from the tank is good.

Yep - certain now - Runs for 10 mins or so, then stops. Pressing the button (unlabelled) on the control box starts it up again for another 10 mins.

Arrgh! The boiler just ran for about 15 mins then gave up again. I just whipped out the photosensor and gave it a wipe, put it backand and pressed the button on the Satronic Control box and it fired up again. This has happened twice now....how can I figure out what is causing it to shut...

P.S - I don't have a pump, but the air bubble purged by itself through the pump (I guess this cant be good for the pump though!)

Cheers very much, I just took the burner off, gave the photo cell a wipe, and while I was there I followed the manual and did the service procedure cleaning the combustion head and nozzle etc. She then fired up straight away and is running fine now. Hopefully this won't come back! Thanks...

Further to that - I've just taken off the external boiler cover and noticed that there is a big air bubble in the supple pipe.......should I try to purge it out? (Note this is a wallstar - tank is below the level of the boiler....I thought that meant this boiler would 'suck' the oil...

Morning all :) I've got a pretty fancy (I think) unvented CH/DHW system powered by a 2001 Oil-fired HRM Wallstar 15/19 Boiler. I've asked some separate questions about it in another thread, but now, much more urgently, the thing has stopped firing up! Some key facts: - There is no room...

Cheers v much guys We're going to order the Pack 2, since I'd like a thermostat to keep a limit on rooms temps and save some economy. By the way - the boiler model is HRM Wallstar 15/19 with an EOGB Sterling 40 burner and Danfoss pump. As it happens, it packed up last night so I'm just about...

Tha ks very much for that, i'll give it a go. P.s I assume I leave the bypass valve alone?

Once again I thank you for your time. Regarding balancing - googling it, I just come up with a load of info on balancing radiators....rather than balancing DHW/CH, is this something I can DIY? The Sundial pack looks good, and the wife likes it. I'm happy with wiring so long as I don't need to...

Hi again, Stem - thanks very much for taking the time there - very much appreciated :) Here are some photo's now. There are two, 2-port motorised valves which are both working (I can hear them operating when I operate the control). Below is a photo of the layout, showing the bypass valve to...

Can anyone help? I just want to know if I can programme the DHW&CH independently with the a more modern unit, and that it'll fit the backplate. P.S - I can't find a thermostat anywhere in ym house....is this unusual? :D Tom

One of these.... https://www.google.co.uk/search?site=imghp&tbm=isch&source=hp&biw=2462&bih=1191&q=st699&oq=st699&gs_l=img.3..0j0i30k1j0i5i30k1j0i24k1l7.1268.2034.0.2164.5.5.0.0.0.0.135.509.0j4.4.0....0...1ac.1.64.img..1.4.501.aQs9-xKCCRg#tbm=isch&q=honeywell+st9400 Instead of one of these :)...

Whoops pics don't work.... Current programmer is a Honeywell ST699, I was thinking for upgrading to a ST9400... :)