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Thank you for your helpful post. I keep saying bloody transistor rather than resistor. Sorry!

My friend's Dad is a TV engineer and deals with PCB boards. I have asked him to replace the transistor.

Who would I get to do this? I won't touch it. Does it mean getting someone to replace the resistor or would it mean fitting a new pcb board?

Hi, It is still intact but blackened a little and there is blackening around the plastic casing. However, my heating has started to work again. Strange? It says R28. The resistors to the left are the same size and colour.

Should I cancel the cheque. I feel hard done by. He came, he saw and he picked up a cool 60 quid just before finish time. I am raging.

Well, the guy came at 5 pm today but at 1 pm, the boiler started in sync with thermostat. :shock: Anyway, I was held over at work and couldn't be in to greet him. However, my wife explained the problems to him that we've been having and he said that the PCB appears to be fine (but the...

Hi, I have asked Sime to recommend someone. He's coming tomorrow to look at it. What do you mean by fixed price? How much do you think it will cost? Cheers, Victor

It was fitted in April 2007. It's not a condensing boiler. Does that help? Cheers, Victor

Hi Tony, I mentioned earlier that it was combi. Why would it be the wrong boiler to be fitted? Cheers, Victor

Thank you for the quick replies. There doesn't appear to be any surge protection on the outside of the boiler. It looks like the power to the boiler is coming directly from the mains. :shock: This cannot be right? Could this be the cause of the problem? ...it appears that diode had blown...

:D

Anyone? :(

Hello guys, My combi bolier isn't working correctly and it is only 17 months old. When I turn the thermostat up, nothing happens. It only seems to work when I manually turn the selector switch summer/winter to "gas flame" position. Even then it runs for approximately 10 minutes and then...

Thanks Breezer, i will do.

We do that during the summer but isn't really feasible during the winter. It is too cold up here to do that.

Hi Guys, I have recently moved into a new home. The house is fitted with double glazed windows but I have noticed that there are no ventilation slots at the top of the window frames. The ceiling in the bedrooms appear sto be forming slight damp and I presume it is because the mositure cannot...