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It would just be good practice to link in a nice big radiator on a simple CH circuit, just to keep the boiler happy until you can do the rest of the install. Alfredo

No, you just did incompetent. Before doing anything else I have to say this is not a problem to be tackled by the untrained or the unfamiliar with this type of system. At best you will mess up, at worst you will hurt yourself/someone else. Its just a wee bit complicated to deal with on a forum...

I'd have a word with Ariston Technical helpline to see if they have any experience of this. They may not of ocurse, but its always a good first call. What you want to avoid is water inside the casing obviously, and if this is occurring regularly then the overall gradient of the flue may be...

You certainly get what you pay for on this forum..thats for sure :lol: On reflection its probably a suspect OP as someone observed. Alfredo

Showing my ignorance..is the system open vent or sealed? If open..could it be blocked cold feed starving system of water, but enough to run each system CH/HW independently..its a long shot i know :? Alfredo

What the make and model of combi, sometimes this is relevant, sometimes not when this sort of thing happens, but its always useful to know what we are dealing with. Alfredo

If you need to ask such a basic question, then it would be unwise to instruct you to even try, for personal safety reasons if nothing else. I'd suggest one of two things. 1) buy yourself a DIY book on plumbing and learn the basics. It will stand you in good stead. I'm not being flippant...

I'm not familiar with this model, but in general terms. 1) For a non condensing horizontal flue, the flue should have a slight downward tilt as it exits the external wall, precisely so that rain does not get in, or drains out 2) its the opposite for a condenser as any water will be...

Try pump on speed 1..and see what happens. If the system still works OK and the pumping over stops..then its job done. I know we all call it a pump, but its not a pump at all..its a circulator, and as such does not necesarily have to be that powerful. The system might not work properly on 1...

Excellent.....as an addendum to my other highly technical advice (give it some welly etc) I now add....."Stick some gloop in it" Takes years of training and experience you know :oops: :roll: Alfredo

Does changing pump speed have any effect? Alfredo

With a combi the boiler only gets 3 or 4 seconds to heat the hot water as it passes through the heat exchanger, so the rate at which you run your tap/shower is relevant, but not necessarily the whole story. Either, not enough heat is being applied to heat the Hot Water, so he should have...

I have a non condensing Vokera Linea 28 combi in my house, and spend a lot of my working time with Glow Worm 30Cxi boilers..so whats my conclusion ? My Vokera has been in since Nov 2000 and has never missed a beat, and the Vokera boilers I service (Mynute 10 SEs mainly) have few problems. I...

The attitude of your gas fitter seems pretty appalling if he is seriously suggesting a 15mm supply to your new boiler. You could let him install it..then insist he does a working pressure test with all appliances on and with combi calling for hot water. He's only allowed a 1mb drop..and I bet it...

Zigg What you havn't made quite clear is how the system was working before you decided to flush, or whether the system has ever worked properly. Give us some history prior to your first decision to flush. Were they working at all then? Alfredo

Are you sure you havn't just got an airlock somewhere in the system. This sometimes happens when you have had a system empty and refill it. Try pump on 3 temporarily, and wang(technical term) boiler stat to max..temporarily to give the whole system some welly(another technical term). It might...

1) What pressure are you trying to fill it to..should be 1 bar when cold 2)When central heating is hot what is the pressure reading? does it rise quicky to in excess of 2.5bar 3) If you switch off CH and just use Hot Water..does it still lose pressure. 4) have you checked the pressure relief...

I'm currently trying Tesco cocoa butter body lotion for when i get home...its pretty cheap and seems to be alright. In the van I keep a tube of Neutrogena 'Norwegian Formula' hand cream which is more pricey, but you don't need much. It helps, but your hands can still end up pretty raggy and...

I had an ancient MIRA 8 for years, and I overhauled it twice with the washer kit. If you are in a hard water area then its quite likely you will find incrustation which need cleaning out quite carefully. Other than that go steady and its fairly straightforward. Keep the old circlips incase you...

More than likely a crappo gate valve. I've had them leak, fail fully open, fail fully closed, fall to bits in my hands, collapse due to dezincification..you name it..they do it. Alfredo