well i back on with same probs as a while back no heat from heater i flushed matrix through last time and got bit of warmth for day or so :)then back to no heat again so been out there again today and flushed through again reconnected resyncened heater by pushing auto button and off button at same time and still cold

could it be the HBV have taken vacumm pipe off top off hbv there doesnt appear to be any sucking or blowing coming from end off it .. should there ? forgot to mention its an omega 3.0 elite finally should the digital heater numbers be visable in the dark ? bulbs gone ?