I have a Valliant turbomax which has developed a strange problem. Over
the last couple of weeks while its been hot, I have noticed that
during the night, the radiators get hot ? and then back to being off
during the day and its not the timer.
I'm not sure if the weather has got anything to do with it but I have
checked the diaphram in the diverter valve and its OK.
If this was an earler model (VCW or Sine) I would go for the control box
but it is not.
I'd like some more info like:
Is the boiler firing when the rads get hot? (Likely yes).
Is the pump going? (Likely yes).
Are the rad getting hot when you draw HW or at other times? Yes diverter valve problem. No is more likely a PCB problem.
Ed Sirett - Property maintainer and registered gas fitter.
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