The boiler has just been serviced and lots of new parts fitted, On firing up all works fine for approx 15 seconds then the flame cuts out but the motor keeps running, after approx 10 seconds the flame fires up again for 15 seconds and the same thing happens. If I remove the front door/cover of the boiler it all works fine as it should until I refit the door/cover then the same thing happens. It is as if the burner is not getting enough air/oxygen. The boiler has a balanced flue which I have checked and there is no blockage. Do any of you clever chaps have an idea of what could be causing this and where I should be looking.
Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Can't remove it without forcing it and I don't want to damage it. However I have removed the flat plate from the outside of the balanced flue , it has a small hole in it for the engineer to insert the probe (hope that makes sense to you) and now the boiler is working fine just as it should. when it has cooled down I will refit the plate and see if the fault returns.
DIY service, the engineer that used to service it retired and has since passed away, I have contacted two others and because of the age they just wanted to sell me a new boiler.
Yet you say it's just been serviced and new parts fitted.
Dont be fobbed off with the new boiler spiel, yes they are more efficient but it's not cost effective to swap a boiler just on those grounds.
I try to get my customers to keep the older boilers, far more robust, and only look at replacing them if its costing a lot of money to maintain or the shell bursts.
Find a good engineer and go from there, oh and stop playing with a combustion device that could kill you and your family.
No I don't have an analyser I need to find somebody who can do it for me but everybody seems very busy at the moment. I am near Redruth in Cornwall.
Yes I serviced and fitted the parts myself they are easy to find on the internet. I am a retired aircraft engineer so have some engineering knowledge. I would like to keep my boiler going for as long as possible because it has been very reliable up to now.
My sister is an aircraft technician, so I know all too well the level of understanding someone in that field has. However a good engineer knows when they are out of their depth, especially when you don't have the one thing crucial to setting up a fuel burning appliance, the flue gas analyser. Based on the above I'm pretty certain you are recirculating POC (products of combustion). I appreciate you are struggling to find a decent engineer but playing with parts and without the proper equipment there could be all sorts of gremlins going on inside. I suggest going on the OFTEC website and searching for technicians in your area, oil is very common in your area, you should have no problem finding someone. With regards to your boiler, they don't make them like they used to, parts are still readily available for your burner, however significant improvements in fuel efficiency would happen when you decide to get your boiler replaced.
A friend of mine has given me the details of an engineer that they have used and recommend, I will contact him and see if he can fit me in I know they are all busy at the moment, if not I will try the OFTEC website as you suggest, thank you for your help I need to get it sorted soon as winter is appon us.
Motor because it was making a noise and running very slowly, capacitor because old one had a split in it, control box because it was the original one fitted and bits of the plastic cover had broken off because of age and heat, it was very brittle. and a new nozzle and photocell because of age. also a new green flexi oil pipe.
Official Sponsors of Plumbers Talk
Similar plumbing topics
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.
