I'm hoping some of the frequent posters about gas boilers might be able to give me some advice. I had a new gas boiler fitted about 3 years ago. It's a Saunier Duval Themaclassic F30E SB. Right from the off the system seemed to lose pressure and had to manually topped up. The plumber wasn't sure initially if there was a leak in a pipe etc or if it was the boiler. He added the leak seal stuff, cleaned the rad's out etc and eventually came to the conclusion that as there was evidence of water in the boiler's overflow pipe it was a faulty valve in the new boiler.
He got in touch with the boiler provider and he looked for a new valve. To cut a long story short we eventually got a new valve fitted by an installer sent out by the boiler provider as the boiler provider didn't trust the plumber's initial assessment. The new installer agreed with the plumber that it needed a new valve. This was supplied and fitted a few days later. It helped with the problem but I still had to manually top up but a lot less frequently. When I brought this to the attention of my plumber he still thought there might be a small leak as it shouldn't be losing pressure. I always suspected the boiler wasn't quite right. Both of us were tired of the constant follow ups and as no major leaks showed up I let it pass.
I am now certain there is a problem with the boiler as everytime I have the heat on for a prolonged length of time the boiler overheats (2.9 bar flashes) and it dumps the water out of the system throught the overflow pipe. This can't go on and I want to get advice on what the problem could be, what it is likely to cost to fix. I am in two minds on whether to go to my usual plumber to get it fixed or whether it is better to go to an approved gas installer on the Bord Gais site to get a second opinion. I don't have a clue about these things and I feel bad about doubting my plumbers abilities but if he didn't fit it correctly then I could be throwing good money after bad by calling on him to fix it.
He got in touch with the boiler provider and he looked for a new valve. To cut a long story short we eventually got a new valve fitted by an installer sent out by the boiler provider as the boiler provider didn't trust the plumber's initial assessment. The new installer agreed with the plumber that it needed a new valve. This was supplied and fitted a few days later. It helped with the problem but I still had to manually top up but a lot less frequently. When I brought this to the attention of my plumber he still thought there might be a small leak as it shouldn't be losing pressure. I always suspected the boiler wasn't quite right. Both of us were tired of the constant follow ups and as no major leaks showed up I let it pass.
I am now certain there is a problem with the boiler as everytime I have the heat on for a prolonged length of time the boiler overheats (2.9 bar flashes) and it dumps the water out of the system throught the overflow pipe. This can't go on and I want to get advice on what the problem could be, what it is likely to cost to fix. I am in two minds on whether to go to my usual plumber to get it fixed or whether it is better to go to an approved gas installer on the Bord Gais site to get a second opinion. I don't have a clue about these things and I feel bad about doubting my plumbers abilities but if he didn't fit it correctly then I could be throwing good money after bad by calling on him to fix it.