Thanks for the reply.
No other problems with electrical components in the house associated with any voltage surge so think that I will have no option but to replace the unit.
Cheers
Hi there, unit has been installed now for approx 3 years without problems however I'm now experiencing problems where the visual display is lost but the two red lights stay on and obviously the CH and WH stays on all the time.
If I press and release the reset button the display and setting's...