I am hoping someone out there can offer some advice. For 6 months our Potterton SL15 has been misbehaving - from complete failure to now short cycling. We have had three different gas safe registered companies attend (including BAXI) and they all did the same - replaced parts until the boiler worked. So we have a new main board, ignition system and pump. But the problem we started with six months ago remains and the last fitter said to us he had no idea what was wrong and we should just get a new boiler. The boiler (when it works, does work well) is probably not the problem but I do not know what to do next.
The boiler etc works as it should on the hot water but misbehaves on the heating cycle. The problem is the same whether the heating is set to all day or timed. So, to the problem:- when first asked for heat in the morning the boiler fires up and the system works for several hours exactly as it should, it also works as it should in the evening. During the day however, from late morning to about 6pm, the boiler fires up, runs for three or four seconds and shuts down. A few minutes later it happens again and so on.
The controller and hall thermostat have both been replaced (like for like) but no difference.
I know I need a heating engineer but three so far have been unable or unwilling to look further into the problem.
All suggestions welcome.
The boiler etc works as it should on the hot water but misbehaves on the heating cycle. The problem is the same whether the heating is set to all day or timed. So, to the problem:- when first asked for heat in the morning the boiler fires up and the system works for several hours exactly as it should, it also works as it should in the evening. During the day however, from late morning to about 6pm, the boiler fires up, runs for three or four seconds and shuts down. A few minutes later it happens again and so on.
The controller and hall thermostat have both been replaced (like for like) but no difference.
I know I need a heating engineer but three so far have been unable or unwilling to look further into the problem.
All suggestions welcome.
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