I have an Ideal Logic 35 that has to be topped up every day as the pressure is dropping & it eventually comes up F1 error code. I have also noticed that the diverter valve head keeps clicking on and off when the heating gets up to temp. and the boiler shuts down. Could this be the cause of the loss of pressure.Could the diverter valve body be faulty. Or is the pressure switch actuating because there is a leak ( perhaps in the heat exchanger) and operating the diverter valve. The leak is definitely somewhere in the boiler as it loses pressure even with the flow & return isolated and the boiler switched off.
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