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Could the thermistors be the cause of my original problem (lack of hot water) after cleaning the HE the hot water did work fine most of the time and after reading back through some posts people have suggested this as a cause for the lack of hot water. What do the thermistors do? Thanks in...

Had the heating on this morning, worked fine, went to run a bath and while watching the boiler display I noticed that the boiler kept displaying error 7 for a split second then it fired up again then error 7 again until after about 10 seconds it just said error seven and went out, it reset after...

Thanks for the reply, turned the hot tap on again and the boiler fired up, water ran warm then cold but the bolier kept running all the time, at least two rads began to get warm, if it was a faulty pcb why would the tap fire up the boiler on the hot water side? just trying to understand not...

I have a Linea 24 boiler approximately 4 years old, recently I have experienced hot water problems, I have read numerous posts on this site and convinced myself that the problem was with the secondary (plate HE), the central heating would work fine and when we wanted hot water the taps would run...