Off the top of my head i can think of 3 possable reasons. 1) faulty air pressure switch. 2) The ion rod is faulty. 3) Not enough water pressure in the system so the flow switch is not reading properly. Failing those checks it would pay to look at the control board/s and look for cracked solder joints or black burnt marks.
aj
July 2012
best to give helplink a call they are uks main service engineers tel freephone 08009154321
wazna
July 2012
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