I have a Camray 5 external boiler. It is three years old and keeps running pumps. It has the new Riello G RGB 8-716-115-297-0 part fitted, but after a couple of months it packs up again. Time and time again the Worcester-Bosch team send out inexperienced engineers to fix it, but we end up having one of their senior techs come and fix it. They look for every excuse possible to blame everything else, but on replacing the pump everything is fine again. There is good oil flow from the tank to the boiler. It is £210 call out charge every time this happens and I am getting sleepless nights over it. Anyone else out there had a similar problem.

Thanks, Martin Longmore, Looe. Cornwall.

Martin Longmore, November 2009

I would have told you to fit a tiger loop before i even visited, Riello pumps cannot handle any form of suction lift on a single pipe system, I am very supprised at the lack of knowlege shown by the manufacturers own engineers!! moral of the tail - don't use W.B. service department, look for a local oil specialist near you

www.oftec.org will assist you to find such a person near to you

www.elanar.co.uk, December 2009

To answer my own question, to anyone who may be interested. My system uses a one pipe installation; this means that there is one pipe from the top feed entry from my bundied tank to the oil burner, as opposed to a two pipe system that has a return pipe back from the pump to the tank. I guess the return pipe acts as a relief for the pump and saves a continuous backing up of oil waiting for use and thus avoids 'frothing.'
I have now had a Tiger Loop fitted which in practice acts similary to a two pipe system with the benefit of aerating; expelling any air in the system and relieving the build up of oil at the pump. Anyone out there who wishes to know how a Tiger Loop works; just type Tiger Loop in on your search engine and all will be revealed.
I only wish one of the six different engineers who visited me from Worcester-Bosch had told me this over the period of eighteen months before I paid an extortionate ammout of money to them, and still not had the boiler fixed. To add insult to injury, a senior tech from Worcester-Bosch was the last person to look at the boiler, only to leave two pipes in it leaking oil. Only days before they were telling me that it was not the boiler giving problems but my installation.
As luck would have it, I happened to find a local Installer who was willing to fit a Tiger Loop. At the same time he found the leaking pipes, one was from the oil pump feed to the nozzle. No wonder the boiler broke down two days after Worcester-Bosch supposedly repaired it. I am not happy with them and they are going to know about it.
The boiler is now working perfectly, but I still have had to pay a further bill of £170.00; better than paying £210.00 to Worcester-Bosch for every visit.

Martin Longmore Looe Cornwall., December 2009