I had the same problem. Oftencutting out more than 3-4 times a day (and annoyingly at night when the pump was running ALL night!).
After checking various forums, I came across some good advice.
Apparently the solder quality of the PCB boards is sub-standard. Remove the PCB and check the soldered joints, mainly on the joints where the wires connect into the board.
I found many 'cracked' joints. I resoldered and have been problem free for two years!
SJBSO2000
March 2008
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